Why rectum shows the least rate of peristalsis?
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In our digestive tract, smooth muscle tissue contractions in a sequence produce the peristaltic wave, which helps propel a ball of food through esophagus (food pipe) and chyme (semi liquid mass of partly digested food) in the stomach. Once food passes the stomach, a typical peristaltic wave travels only few centimeters and lasts only for a few seconds; since the primary purpose is to mix the chyme in the intestine rather than to propel it forward in the intestine (as happens in esophagus/ stomach).
The large intestine also exhibits peristalsis like small intestine uses (not propulsion). These general contractions occurs 1–3 times per day in the large intestine, propelling the chyme toward the rectum and these are triggered by food intake (gastro colic reflex).
With these facts least peristaltic movement is in large intestine.
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The large intestine also exhibits peristalsis like small intestine uses (not propulsion). These general contractions occurs 1–3 times per day in the large intestine, propelling the chyme toward the rectum and these are triggered by food intake (gastro colic reflex).
With these facts least peristaltic movement is in large intestine.
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