what is peristaltic movement
Answers
Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde 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 before being transformed into 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,[1][self-published source?] and some modern machinery imitates this design.The word comes from [New Latin]] and is derived from the Greek peristellein, "to wrap around," from peri-, "around" + stellein, "draw in, bring together; set in order".[2
Answer:
Peristalsis is successive waves of muscular contractions and relaxation which moves the food along the digestive tract. Peristaltic movement occurs by relaxation of circular smooth muscles above the bolus and the contraction of longitudinal muscles below the bolus. It helps in properly mixing up of food with digestive enzymes for proper digestion and the movement of the food through the alimentary canal.