How is a human stomach adapted to:
(i) Protein digestion?
(ii) Churning?

Answer:

(i)
- Has gastric gland which produces digestive juices that contain pepsin enzyme
that digests protein to peptides also renin that curds milk/enzymes for chemical
breakdown of proteins.
- Gastric juice contains hydrochloric acid that provides acidic medium for maximum pepsin
enzyme activity to digest proteins.
(ii)
- Has smooth muscle that contain thick circular and longitudinal layers which contract
and relax producing movements that mix contents of the stomach.

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How is a human stomach adapted to: (i) Protein digestion? (ii) Churning?

How is a human stomach adapted to:
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