Question

Question 4
The swallowed food moves downwards in the alimentary canal because of

(a) Force provided by the muscular tongue.
(b) The flow of water taken with the food.
(c) Gravitational pull.
(d) The contraction of muscles in the wall of food pipe.

Answer 1

Peristalsisis a series of wave-like muscle contractions that moves food to different processing stations in the digestive tract. The process of peristalsisbegins in the esophagus when a bolus of food is swallowed.