what is peristalsis ?

Peristalsis refers to the process by which the food is transported from the buccal cavity to the stomach with the help of the expansion and contraction of the muscles present in the oesophagus. After the peristaltic movement in the oesophagus, food particles move down the oesophagus and reach the stomach.

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Peristalsis refers to the contraction and relaxation of muscles of the walls of the digestive system. This movement helps in pushing the foood forward in the digestive system.

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Peristalsis is a distinctive pattern of smooth muscle contractions that propels food through the esophagus and intestines. 

Muscles in the organs of the digestive system aid the mechanical digestion by squeezing and pushing the food along.
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