In the 'Breathing and Exchange of Gases' chapter, the functionality of oxygen and carbon dioxide have been thoroughly explained. As we all know, organisms use oxygen to indirectly break down simple molecules, such as amino acids, fatty acids, glucose, etc. and derive energy that is utilized to carry out various activities. Carbon dioxide, which is considered harmful for, both living organisms and the environment, is also let out when the above catabolic reactions occur.
Hence, in this chapter, it has been made evident that the cells require an uninterrupted supply of oxygen and the carbon dioxide that is produced by the cells needs to be sent out continuously. This process of giving and taking carbon dioxide produced by the cells and oxygen from nature respectively is called breathing, and scientifically respiration. Want to know more about the topics of this chapter, read below.
The students get an insight into the mechanism of breathing from this chapter. A human's respiratory system consists of respiratory organs that assist in the breathing process. Breathing, technically termed respiration, has been defined in the chapter as an exchange process between two gases, i.e. inhale of oxygen from the atmosphere and exhale of carbon dioxide produced by the cells, from the body into the atmosphere.
The whole chapter majorly talks about the meaning, definitions, importance, and differentiation of respiration and breathing. A few other relevant topics covered under this chapter are different respiratory volumes and capacities, transport and exchange of gases, major respiratory disorders, and more.
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