what is peristalsis.when does it ocour
Answers
Peristalsis, involuntary movements of the longitudinal and circular muscles.
Occurs in oesophagus , intestines, stomach.
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Answer:
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. When certain muscles in the digestive and urinary tracts contract, it is called peristalsis. Peristalsis is a particular, wave-like kind of muscle contraction because its purpose is to move solids or liquids along within the tube-like structures of the digestive and urinary tracts. per·i·stal·ses (-sēz) The wavelike muscular contractions of the digestive tract or other tubular structures by which contents are forced onward toward the opening. [New Latin, from Greek peristaltikos, peristaltic, from peristellein, to wrap around : peri-, peri- + stellein, to place; see stel- in Indo-European roots.]
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