Which of the following play passive role during breathing?
Correct answer: A. Lungs
- A. Lungs
- B. Intercostal muscles
- C. Diaphragm
- D. Pleura
Explanation
Lungs neither pull air in nor can they push it out. During inspiration passive expansion of lungs occures and expiration is due to passive contaction of lungs.
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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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