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| Description: Peristalsis is a radially symmetrical contraction and relaxation of muscles which propagates in a wave down the muscular tube, in an anterograde fashion. In humans, peristalsis is found in the contraction of smooth muscles to propel contents through the digestive tract. Earthworms use a similar mechanism to drive their locomotion Picture Stats: Views: 638 Filesize: 60.78kB Height: 559 Width: 649 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=18166 |