During exercise the breathing rate may rise to:
Correct answer: C. 30 times per minute
- A. 15 times per minute
- B. 20 times per minute
- C. 30 times per minute
- D. 25 times per minute
Explanation
A rest, we inhale and exhale 15_20 times per minute. During exercise, the breathing rate may rise to 30 times per minute
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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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