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Homeostasis, Nutrition, Digestion & Absorption › View

The stomach wall produces mucus to cover its surface. Which of the following statements correctly describe(s) the function of the mucus?

(1) It kills the bacteria in the ingested food.

(2) It prevents the rubbing of food against the stomach wall.

(3) It protects the stomach wall from the action of the digestive enzymes.

A. (1) only

B. (3) only

C. (1) and (2) only

D. (2) and (3) only

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Body › View

Milk teeth are ___ in number

A. 30

B. 20

C. 10

D. 32

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