What is peristalsis? what is its importance? please answer fast......
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Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an intergraded direction.
In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food (called a bolus while in the esophagus and upper gastrointestinal tract and chyme in the stomach ) along the tract. Peristaltic movement comprises relaxation of circular smooth muscles, then their contraction behind the chewed material to keep it from moving backward, then longitudinal contraction to push it forward.
Earthworms use a similar mechanism to drive their locomotion, and some modern machinery imitates this design.Peristalsis is the rhythmic movement of muscles of the alimentary canal to push food through the track for digestion and absorption. This movements occur due to the length - wise and breadth - wise contraction of the Circular and Longitudinal layers of the Muscularis layer of the alimentary canal.
In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food (called a bolus while in the esophagus and upper gastrointestinal tract and chyme in the stomach ) along the tract. Peristaltic movement comprises relaxation of circular smooth muscles, then their contraction behind the chewed material to keep it from moving backward, then longitudinal contraction to push it forward.
Earthworms use a similar mechanism to drive their locomotion, and some modern machinery imitates this design.Peristalsis is the rhythmic movement of muscles of the alimentary canal to push food through the track for digestion and absorption. This movements occur due to the length - wise and breadth - wise contraction of the Circular and Longitudinal layers of the Muscularis layer of the alimentary canal.
sushmitasharma:
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Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.
importance: It moves: Food through the digestive system. Urine from the kidneys into the bladder.
importance: It moves: Food through the digestive system. Urine from the kidneys into the bladder.
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