During inspiration the space inside the chest cavity is increased due to :
Correct answer: D. The contraction of the muscles of the diaphragm
- A. Increased pressure
- B. Relaxation of the external intercostal muscle
- C. The relaxation of the muscle of the diaphragm
- D. The contraction of the muscles of the diaphragm
Explanation
During inspiration muscles of ribs and diaphragm contract due to whiclh ribs are elevated and diaphragm become less dome shaped. The space in chest cavity is increased.
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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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