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Muscularis Extema is the layer of the digestive tract wall that is responsible for peristalsis.
Answer by Peakay Tea. Confidence votes 50.7K. Peristalsis is a distinctive pattern of smooth muscle contractions that propels food through the esophagus and intestines. radially symmetrical contraction and relaxation of muscles which propagates in a wave down a muscular tube, in an anterograde fashion.