The oral cavity performs essential functions EXCEPT:
Correct answer: D. Digestion of protein
- A. Selection of food
- B. Grinding and mastication
- C. Lubrication
- D. Digestion of protein
Explanation
The mouth or oral cavity is the first part of the digestive tract. It is adapted to receive food by ingestion breaking it into small particles by mastication and mixing it with saliva. But digestion of protein does not occur in the oral cavity rather it occurs in the stomach.
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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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