Question

where does the first phase of digestion begin in man​

Answer 1

Answer:

The first stage is the cephalic phase of digestion which begins with gastric secretions in response to the sight and smell of food. This stage includes the mechanical breakdown of food by chewing, and the chemical breakdown by digestive enzymes, that takes place in the mouth.

Explanation:

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Answer 2

Answer:

digestion of food start at mouth...