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Peristalsis in the alimentary canal is caused by the: A.contraction of muscle layers B.action of digestive enzymes C.stretching of the mucosa D.closing of the epiglottis

Sagot :

It occurs because of contraction of the muscle layers. There are two types of muscle found in the alimentary canal; longitudinal and circular muscle, the alternating contraction of these muscles forces the bolus of food through the digestive system.
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