what is peristalsis?
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Explanation:
the movements that the large tubes inside the body make automatically to push something out or along
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After food is chewed into a bolus, it is swallowed and moved through the esophagus. Smooth muscles contract behind the bolus to prevent it from being squeezed back into the mouth. Then rhythmic, unidirectional waves of contractions work to rapidly force the food into the stomach
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