{"id":298369,"date":"2026-03-25T14:45:45","date_gmt":"2026-03-25T09:15:45","guid":{"rendered":"https:\/\/www.aakash.ac.in\/blog\/?post_type=web-story&#038;p=298369"},"modified":"2026-03-25T14:57:06","modified_gmt":"2026-03-25T09:27:06","slug":"cbse-class-12-biology-exam-2026-all-important-diagrams","status":"publish","type":"web-story","link":"https:\/\/www.aakash.ac.in\/blog\/web-stories\/cbse-class-12-biology-exam-2026-all-important-diagrams\/","title":{"rendered":"CBSE Class 12 Biology Exam 2026: All Important Diagrams"},"content":{"rendered":"<p><html amp=\"\" lang=\"en\"><head><meta charSet=\"utf-8\"\/><meta name=\"viewport\" content=\"width=device-width,minimum-scale=1,initial-scale=1\"\/><script async=\"\" src=\"https:\/\/cdn.ampproject.org\/v0.js\"><\/script><script async=\"\" src=\"https:\/\/cdn.ampproject.org\/v0\/amp-story-1.0.js\" custom-element=\"amp-story\"><\/script><link href=\"https:\/\/fonts.googleapis.com\/css2?display=swap&amp;family=Alegreya%3Awght%40400%3B700&amp;family=Anton\" rel=\"stylesheet\"\/><link href=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3.png\" rel=\"preload\" as=\"image\"\/>\n<style amp-boilerplate=\"\">body{-webkit-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-moz-animation:-amp-start 8s steps(1,end) 0s 1 normal both;-ms-animation:-amp-start 8s steps(1,end) 0s 1 normal both;animation:-amp-start 8s steps(1,end) 0s 1 normal both}@-webkit-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-moz-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-ms-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@-o-keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}@keyframes -amp-start{from{visibility:hidden}to{visibility:visible}}<\/style>\n<p><noscript><\/p>\n<style amp-boilerplate=\"\">body{-webkit-animation:none;-moz-animation:none;-ms-animation:none;animation:none}<\/style>\n<p><\/noscript><\/p>\n<style amp-custom=\"\">\n              h1, h2, h3 { font-weight: normal; 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Expert Review (3)\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3.png 1080w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-864x1536.png 864w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-768x1365.png 768w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-750x1333.png 750w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-576x1024.png 576w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-169x300.png 169w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-3-150x267.png 150w\" sizes=\"(min-width: 1024px) 45vh, 100vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:11.65049%;top:43.3657%;width:64.56311%;height:33.00971%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.7518796992481203% 0.7518796992481203% 0.7518796992481203% 0.7518796992481203% \/ 0.9803921568627451% 0.9803921568627451% 0.9803921568627451% 0.9803921568627451%\" id=\"el-bd47cade-6158-406e-9b1e-da0f18c790ef\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.2407894736842118% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.663430em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #ffd900\">&nbsp;Biology Exam 2026:&nbsp;<\/span><br \/>\n<span style=\"font-weight: 700; color: #ffd900\">All Important Diagrams<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:24.02913%;top:5.17799%;width:52.18447%;height:8.41424%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.9302325581395349% 0.9302325581395349% 0.9302325581395349% 0.9302325581395349% \/ 3.8461538461538463% 3.8461538461538463% 3.8461538461538463% 3.8461538461538463%\" id=\"el-2e0f7eb5-2a74-43c0-9b69-78da9e064517\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:2.4145621366279078% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.550162em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span>CBSE Class 12<\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:11.65049%;top:17.1521%;width:36.16505%;height:16.66667%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-010d552c-d042-4ba8-bc20-72ccb93f284b\">\n<div style=\"position:absolute;width:100%;height:101.26212%;left:0%;top:-0.63106%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/aakash-logo.png\" alt=\"aakash logo\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/aakash-logo.png 600w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/aakash-logo-300x210.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/02\/aakash-logo-150x105.png 150w\" sizes=\"(min-width: 1024px) 16vh, 36vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><\/amp-story-page><amp-story-page id=\"8941718c-c0aa-40df-9521-7f7428e38c02\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#cc998f\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-541b4671-1910-472e-b3bc-d5690fb60a50\">\n<div style=\"position:absolute;width:100%;height:100%;left:0%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6.png\" alt=\"ICSE Board Class 10 Biology Question Paper Analysis 2026 Difficulty Level &amp; Expert Review (6)\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6.png 1080w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-864x1536.png 864w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-768x1365.png 768w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-750x1333.png 750w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-576x1024.png 576w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-169x300.png 169w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/ICSE-Board-Class-10-Biology-Question-Paper-Analysis-2026-Difficulty-Level-Expert-Review-6-150x267.png 150w\" sizes=\"(min-width: 1024px) 45vh, 100vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:4.61165%;top:0;width:48.78641%;height:26.53722%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.9950248756218906% 0.9950248756218906% 0.9950248756218906% 0.9950248756218906% \/ 1.2195121951219512% 1.2195121951219512% 1.2195121951219512% 1.2195121951219512%\" id=\"el-22f17af6-79e7-4e77-b33a-ca20f4040b34\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:3.190444263059702% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.679612em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #ffd900\">Important Diagrams to Practice<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:14.32039%;top:48.38188%;width:71.35922%;height:42.39482%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6802721088435374% 0.6802721088435374% 0.6802721088435374% 0.6802721088435374% \/ 0.7633587786259541% 0.7633587786259541% 0.7633587786259541% 0.7633587786259541%\" id=\"el-876a5d3a-73f8-49a0-82d6-bbf7287d4677\">\n<p class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.4928571428571434% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.291262em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Human female reproductive system<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Human male reproductive system<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Structure of DNA<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Neuron<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Human heart<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Nephron<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">PCR setup<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Plasmid vector<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Flower structure<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Ecosystem diagram<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Food chain and food web<\/span><br \/>\n<span style=\"color: #edf6f6\">\u2013 <\/span><span style=\"font-weight: 700; color: #edf6f6\">Transcription\/Translation diagram<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/blog\/cbse-class-12-biology-exam-2026-expected-questions-and-diagrams\/\" rel=\"\">Check Imp Expected questions<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"3cf47f47-992d-4bff-aba3-e8c5127c39d3\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#0c3a96\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-f8539bc8-06bd-4864-8760-f467a6ee3068\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:5.82524%;top:0;width:88.34951%;height:10.03236%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5494505494505495% 0.5494505494505495% 0.5494505494505495% 0.5494505494505495% \/ 3.225806451612903% 3.225806451612903% 3.225806451612903% 3.225806451612903%\" id=\"el-977bbf18-4a25-4088-ac79-92f746a8ec6f\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.7198097312843412% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.663430em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #edf6f6\">Neuron<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:10.43689%;top:52.91262%;width:77.91262%;height:36.8932%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6230529595015576% 0.6230529595015576% 0.6230529595015576% 0.6230529595015576% \/ 0.8771929824561403% 0.8771929824561403% 0.8771929824561403% 0.8771929824561403%\" id=\"el-167b55e0-058b-4259-82a8-085de1655a79\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.7774143302180696% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.501618em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #ffd900\">Neurons are the fundamental unit of the nervous system specialised to transmit information to different parts of the body<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:2.91262%;top:14.23948%;width:94.17476%;height:32.52427%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-eeb6ae3d-2cfd-463c-a539-9c0e6841a83a\">\n<div style=\"position:absolute;width:100%;height:104.8153%;left:0%;top:-2.40765%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/image.png\" alt=\"image\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/image.png 663w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/image-300x163.png 300w\" sizes=\"(min-width: 1024px) 42vh, 94vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/biology\/Neuron\" rel=\"\">Detailed Information swipe up<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"6d6f5165-872d-4269-a900-50c82fc4eb12\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#fff\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-862e4abc-60c9-43e3-ac23-82d1cc4b7a77\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:11.65049%;top:-2.589%;width:76.69903%;height:8.09061%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6329113924050633% 0.6329113924050633% 0.6329113924050633% 0.6329113924050633% \/ 4% 4% 4% 4%\" id=\"el-66c7f43f-20f5-4161-b8e1-1e221dbdd437\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5945009642009491% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.533981em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #b82121\">Human heart<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:6.79612%;top:84.78964%;width:85.43689%;height:17.79935%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5681818181818182% 0.5681818181818182% 0.5681818181818182% 0.5681818181818182% \/ 1.8181818181818181% 1.8181818181818181% 1.8181818181818181% 1.8181818181818181%\" id=\"el-80fdab48-5fae-48ec-a37a-74fafa2a7ceb\">\n<p class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.3430397727272726% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.242718em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"font-weight: 700\">It is defined as a hollow, muscular organ having four chambers. It is derived from mesodermal tissue. The size of the human heart is about the size of a clenched fist. The heart is one of the most powerful and labour-intensive muscles in the human body that continues to beat throughout a person&#8217;s lifetime.<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:11.40777%;top:9.38511%;width:80.09709%;height:23.30097%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-1e5a033f-9625-474e-9082-164dff914ee9\">\n<div style=\"position:absolute;width:101.20449%;height:142.6947%;left:-0.56038%;top:-35.89299%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Human-Heart.png\" alt=\"Human Heart\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Human-Heart.png 603w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Human-Heart-300x185.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Human-Heart-150x92.png 150w\" sizes=\"(min-width: 1024px) 36vh, 80vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:11.40777%;top:35.59871%;width:35.19417%;height:10.67961%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-40e99a20-a5eb-4cb6-ade5-583ce0600b00\">\n<div style=\"position:absolute;width:115.43272%;height:135.83028%;left:0%;top:-29.12258%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Myocardium-Human-Heart.png\" alt=\"Myocardium Human Heart\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Myocardium-Human-Heart.png 646w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Myocardium-Human-Heart-300x161.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Myocardium-Human-Heart-150x80.png 150w\" sizes=\"(min-width: 1024px) 16vh, 35vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:49.51456%;top:35.76052%;width:41.99029%;height:10.19417%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-9351cfdf-9632-45f2-9c77-a292b02e67a5\">\n<div style=\"position:absolute;width:100.14256%;height:141.89228%;left:-0.0489%;top:-37.42521%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Endocardium-Human-Heart.png\" alt=\"Endocardium Human Heart\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Endocardium-Human-Heart.png 657w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Endocardium-Human-Heart-300x155.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Endocardium-Human-Heart-150x77.png 150w\" sizes=\"(min-width: 1024px) 19vh, 42vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:26.94175%;top:49.19094%;width:39.56311%;height:12.62136%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-966725ee-696a-4592-8215-50150d534bee\">\n<div style=\"position:absolute;width:100%;height:128.48855%;left:0%;top:-27.15009%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Atria-Human-Heart.png\" alt=\"Atria Human Heart\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Atria-Human-Heart.png 579w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Atria-Human-Heart-300x184.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Atria-Human-Heart-150x92.png 150w\" sizes=\"(min-width: 1024px) 18vh, 40vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:16.26214%;top:64.88673%;width:66.50485%;height:16.82848%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-dc5c9872-7725-437f-b50d-73e58114a8c5\">\n<div style=\"position:absolute;width:100.00904%;height:127.73891%;left:-0.00904%;top:-27.71342%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Auricles-are-the-blood-receiving-chambers-human-heart.png\" alt=\"Auricles are the blood receiving chambers human heart\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Auricles-are-the-blood-receiving-chambers-human-heart.png 691w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Auricles-are-the-blood-receiving-chambers-human-heart-300x145.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Auricles-are-the-blood-receiving-chambers-human-heart-150x73.png 150w\" sizes=\"(min-width: 1024px) 30vh, 67vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/biology\/Human-heart\" rel=\"\">Human Heart &#8211; More Details<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"b3fe3871-9ec8-4cea-8c58-cb4d8a3ee3d4\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#0c3a96\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-eae4780b-2bb5-4d0e-8916-ef54247cf2a4\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:5.82524%;top:0;width:88.34951%;height:10.03236%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5494505494505495% 0.5494505494505495% 0.5494505494505495% 0.5494505494505495% \/ 3.225806451612903% 3.225806451612903% 3.225806451612903% 3.225806451612903%\" id=\"el-0e9041f7-c51e-480b-a785-3c78d652350c\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.7198097312843412% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.663430em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #ffd900\">PCR setup<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:4.12621%;top:63.75405%;width:91.74757%;height:33.00971%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5291005291005291% 0.5291005291005291% 0.5291005291005291% 0.5291005291005291% \/ 0.9803921568627451% 0.9803921568627451% 0.9803921568627451% 0.9803921568627451%\" id=\"el-d3c34ff5-359e-4cd9-8827-81aed727608f\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.5750000000000002% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.436893em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #edf6f6\">Polymerase Chain Reaction (PCR) is a pivotal technique in molecular biology that amplifies DNA segments, enabling researchers to analyze and replicate genetic material.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:2.91262%;top:12.45955%;width:94.17476%;height:48.86731%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-522737ee-00e2-4375-be1f-77c8a198691b\">\n<div style=\"position:absolute;width:111.19292%;height:100%;left:-5.59646%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Polymerase-Chain-Reaction-PCR.jpg\" alt=\"Polymerase Chain Reaction (PCR)\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Polymerase-Chain-Reaction-PCR.jpg 600w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Polymerase-Chain-Reaction-PCR-300x210.jpg 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Polymerase-Chain-Reaction-PCR-150x105.jpg 150w\" sizes=\"(min-width: 1024px) 42vh, 94vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/blog\/polymerase-chain-reaction-pcr-types-functions-importance-uses-effects\/\" rel=\"\">Learn more<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"9076c0be-f10c-4a9d-a617-38c859017753\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#fff\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-c04afb50-3c66-438d-852c-6ccd696b562b\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:11.65049%;top:-2.589%;width:76.69903%;height:8.09061%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6329113924050633% 0.6329113924050633% 0.6329113924050633% 0.6329113924050633% \/ 4% 4% 4% 4%\" id=\"el-94031a18-13bd-4c38-856c-c593abd54e44\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.5945009642009491% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.533981em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #b82121\">Nephron<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.28155%;top:45.46926%;width:84.46602%;height:41.26214%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5747126436781609% 0.5747126436781609% 0.5747126436781609% 0.5747126436781609% \/ 0.7843137254901961% 0.7843137254901961% 0.7843137254901961% 0.7843137254901961%\" id=\"el-c13fc845-66ed-4271-a8d0-499c3f47fe99\">\n<h3 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.4857758620689655% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.339806em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"font-weight: 700\">Nephron is the structural and functional unit of the kidneys. Each kidney has about one million nephrons. Nephrons are long and coiled structures made up of two parts &#8211; renal tubules and the glomerulus. The nephrons are held together in the kidney with the help of connective tissues. The term \u2018nephron\u2019 is derived from the Greek word \u2018nephros\u2019 which stands for the kidney.<\/span><\/span><\/h3>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:3.39806%;top:8.25243%;width:93.4466%;height:31.71521%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-ffcb6b36-0825-4132-9192-3236729750fa\">\n<div style=\"position:absolute;width:100%;height:100.22452%;left:0%;top:-0.11226%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Nephron-class-12-biology-diagram.png\" alt=\"Nephron class 12 biology diagram\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Nephron-class-12-biology-diagram.png 684w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Nephron-class-12-biology-diagram-300x153.png 300w\" sizes=\"(min-width: 1024px) 42vh, 93vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/biology\/Nephron\" rel=\"\">For More Details Swipe Up<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"86c5a204-624e-43a6-8b5d-55eb57f87155\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#000\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-de4e7687-fc9d-4c3c-a4c3-c809c0f3b965\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:29.12621%;top:0;width:41.99029%;height:11.97411%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:1.1560693641618496% 1.1560693641618496% 1.1560693641618496% 1.1560693641618496% \/ 2.7027027027027026% 2.7027027027027026% 2.7027027027027026% 2.7027027027027026%\" id=\"el-f27820d4-5f13-4dda-9195-59567f833221\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:4.324619535765897% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.792880em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"color: #edf6f6\">Plasmid<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.76699%;top:55.82524%;width:84.2233%;height:47.73463%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5763688760806917% 0.5763688760806917% 0.5763688760806917% 0.5763688760806917% \/ 0.6779661016949152% 0.6779661016949152% 0.6779661016949152% 0.6779661016949152%\" id=\"el-d6d952dd-8015-43da-b600-17505dc4dfb5\">\n<p class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.4639769452449566% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.323625em;line-height:1.2;text-align:left;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #edf6f6\">Plasmids are small, circular DNA molecules present outside the main chromosome. They are called extra-chromosomal because they exist separately from the organism\u2019s genome. Despite not being essential for survival, they often provide helpful traits to the host. Plasmids are transferred between bacteria through various modes of horizontal transfer. This makes them important in sharing traits like antibiotic resistance.<\/span><\/span><\/p>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:7.76699%;top:14.56311%;width:84.2233%;height:38.67314%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-04cd2adc-117f-459f-9f4b-82f2b3a7733e\">\n<div style=\"position:absolute;width:122.44637%;height:100%;left:-11.22318%;top:0%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Plasmid-class-12-biology.png\" alt=\"Plasmid class 12 biology\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Plasmid-class-12-biology.png 512w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Plasmid-class-12-biology-300x169.png 300w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Plasmid-class-12-biology-150x84.png 150w\" sizes=\"(min-width: 1024px) 38vh, 84vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/important-concepts\/biology\/plasmid\" rel=\"\">Know  more<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"fb36abba-c0f2-415d-9cd5-f69e83873cdc\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#0c3a96\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-61a77694-5018-4e0e-a76c-13ef1d39bf85\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:5.82524%;top:0;width:88.34951%;height:10.03236%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5494505494505495% 0.5494505494505495% 0.5494505494505495% 0.5494505494505495% \/ 3.225806451612903% 3.225806451612903% 3.225806451612903% 3.225806451612903%\" id=\"el-cc585840-1991-420a-8ad0-96c65006548d\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:1.7198097312843412% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.663430em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #ffd900\">Food Chain<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:4.12621%;top:63.75405%;width:91.74757%;height:37.37864%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.5291005291005291% 0.5291005291005291% 0.5291005291005291% 0.5291005291005291% \/ 0.8658008658008658% 0.8658008658008658% 0.8658008658008658% 0.8658008658008658%\" id=\"el-fc6f8557-fddf-4faf-ae44-8678b03f2fa9\">\n<h2 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:0.5750000000000002% 0;font-family:&quot;Alegreya&quot;,serif;font-size:0.436893em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"font-weight: 700; color: #edf6f6\">A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another. It starts with primary producers and moves through various levels of consumers.<\/span><\/span><\/h2>\n<\/div>\n<\/div>\n<div style=\"position:absolute;pointer-events:none;left:10.43689%;top:13.1068%;width:77.91262%;height:47.57282%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-af5a38cf-1c8e-4c30-923a-0cc215849820\">\n<div style=\"position:absolute;width:177.79001%;height:100.40568%;left:-30.45667%;top:-0.34378%\" data-leaf-element=\"true\"><amp-img layout=\"fill\" src=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Food-Chain.png\" alt=\"Food Chain\" srcSet=\"https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Food-Chain.png 725w,https:\/\/blogcdn.aakash.ac.in\/wordpress_media\/2026\/03\/Food-Chain-300x155.png 300w\" sizes=\"(min-width: 1024px) 35vh, 78vw\" disable-inline-width=\"true\"><\/amp-img><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/blog\/food-chain-definition-types-importance-examples\/\" rel=\"\">Food chain and food web<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"ee181a82-32d1-4486-a8fb-95a1396476c2\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#000\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-79921c5c-d661-4935-b607-36a19d5cc244\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:11.65049%;top:6.31068%;width:74.51456%;height:72.16828%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6514657980456027% 0.6514657980456027% 0.6514657980456027% 0.6514657980456027% \/ 0.4484304932735426% 0.4484304932735426% 0.4484304932735426% 0.4484304932735426%\" id=\"el-58dd1076-176b-4556-9b33-f6baedbc4380\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:4.326919406555376% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:1.407767em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span><span style=\"color: #edf6f6\">CBSE Class 12 Biology Syllabus<\/span><\/span><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12-biology-syllabus\" rel=\"\">Check Now<\/a><\/amp-story-page-outlink><\/amp-story-page><amp-story-page id=\"d60eee92-ce1d-4030-a481-0eeb7c35fdd0\" auto-advance-after=\"5s\"><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\" style=\"background-color:#ffd900\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:0;top:-9.25926%;width:100%;height:118.51852%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0\" class=\"mask\" id=\"el-4c872eaf-b9ec-42cd-8e0c-b46276f8938c\">\n<div class=\"fill\" style=\"will-change:transform\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-grid-layer template=\"vertical\" aspect-ratio=\"412:618\" class=\"grid-layer\"><\/p>\n<div class=\"page-fullbleed-area\">\n<div class=\"page-safe-area\">\n<div style=\"position:absolute;pointer-events:none;left:9.46602%;top:5.82524%;width:80.82524%;height:60.84142%;opacity:1\">\n<div style=\"pointer-events:initial;width:100%;height:100%;display:block;position:absolute;top:0;left:0;z-index:0;border-radius:0.6006006006006006% 0.6006006006006006% 0.6006006006006006% 0.6006006006006006% \/ 0.5319148936170213% 0.5319148936170213% 0.5319148936170213% 0.5319148936170213%\" id=\"el-cf839e1b-4bd1-499e-8c3b-91e4951354df\">\n<h1 class=\"fill text-wrapper\" style=\"white-space:pre-line;overflow-wrap:break-word;word-break:break-word;margin:2.705239419106607% 0;font-family:&quot;Anton&quot;,sans-serif;font-size:0.954693em;line-height:1.2;text-align:center;padding:0;color:#000000\"><span>CBSE Class 12 Biology Sample Papers and Solutions<\/span><\/h1>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><\/amp-story-grid-layer><amp-story-page-outlink layout=\"nodisplay\"><a href=\"https:\/\/www.aakash.ac.in\/boards\/cbse-class-12-biology-sample-question-paper-solutions\" rel=\"\">Practice Now<\/a><\/amp-story-page-outlink><\/amp-story-page><\/amp-story><\/body><\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Preparing for CBSE Class 12 Biology 2026 Exam. Check  important diagrams for Quick Revision Before the exam.<\/p>\n","protected":false},"author":63,"featured_media":298392,"template":"","meta":{"web_stories_publisher_logo":224678,"web_stories_poster":[],"web_stories_products":[],"footnotes":""},"web_story_category":[],"web_story_tag":[],"class_list":["post-298369","web-story","type-web-story","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CBSE Class 12 Biology Exam 2026: All Important Diagrams - Aakash Blog<\/title>\n<meta name=\"description\" content=\"Preparing for CBSE Class 12 Biology 2026 Exam. 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heart<\/span>","x":48,"y":-16,"width":316,"borderRadius":{"locked":true,"topLeft":2,"topRight":2,"bottomRight":2,"bottomLeft":2},"height":50,"id":"66c7f43f-20f5-4161-b8e1-1e221dbdd437","marginOffset":0.9281250000000014,"type":"text"},{"opacity":100,"flip":{"vertical":false,"horizontal":false},"rotationAngle":0,"lockAspectRatio":true,"backgroundTextMode":"NONE","font":{"family":"Alegreya"},"fontSize":15,"backgroundColor":{"color":{"r":196,"g":196,"b":196}},"lineHeight":1.2,"textAlign":"center","padding":{"locked":true,"hasHiddenPadding":false,"horizontal":0,"vertical":0},"content":"<span style=\"font-weight: 700\">It is defined as a hollow, muscular organ having four chambers. 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