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Arada [10]
3 years ago
13

What is peristalsis and where does it occur?

Biology
2 answers:
Airida [17]3 years ago
6 0
Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.
Firdavs [7]3 years ago
4 0
Stomach muscles contracting
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A total of <u>20</u> amino acids compose the majority of protein in living things and nine are <u>essential</u> to human.

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learn more about amino acids here: brainly.com/question/1201532

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