Which statement best describes the action of peristalsis in the alimentary canal?
Striated muscles contract to move the partially digested food in a wave-like movement along the alimentary canal.
Circular muscles contract behind the partially digested food and the longitudinal muscles shorten.
Skeletal muscle contractions force the food through the alimentary canal with valves preventing backflow.
Longitudinal muscles contract behind the partially digested food and the circular muscles shorten.
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