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Sagot :
The muscularis external's circular and longitudinal muscle layers contract and relax one after the other, producing peristalsis.
Food is moved through the digestive tract by a sequence of wave-like muscle contractions called peristalsis. The process begins in the esophagus, where powerful waves of smooth muscle transport balls of swallowed food to the stomach. The food is then broken down into a liquid substance called chyme there, where peristalsis proceeds. It may be simpler to see the wave-like action if you stretch out a segment of intestine. The chyme is mixed and shifted back and forth by the action. As a result, nutrients can be absorbed by the bloodstream through the small intestine's walls. Peristalsis in the large intestine aids in the absorption of water from undigested food into the blood stream.
Learn more about peristalsis here
https://brainly.com/question/22350049
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