During inspiration fresh air moves in which has high percentage of:
Correct answer: C. N2
- A. CO
- B. O2
- C. N2
- D. CO2
Explanation
Highest concentration in inhaled air and exhaled air is that of N2, that is 79%.
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About Digestion
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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