Q. The process involved in the passage of food in the alimentary canal is:
Solution:
- Peristalsis is a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.
- The process of peristalsis begins in the esophagus when a bolus of food is swallowed.
- Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction.
- Peristalsis is progression of coordinated contraction of involuntary circular muscles, which is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle in the lining of the gut.
- Earthworms use a similar mechanism to drive their locomotion.
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