state the role of hydrochloric acid and villi
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Hydrochloric acid is produced by gastric glands in the stomach. It provides an acidic medium for pepsin, a protein digesting enzyme, to act.
Villi are finger-like projections present in the inner lining of the small intestine and large intestine and are richly supplied with blood vessels.
In small intestine they absorb digested nutrients, and in large intestine they absorb water.
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