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.

Correct Answer: (d) the contraction of muscles in the wall of the food pipe

Explanation:

The contraction and expansion movement which pushes the food further in our digestive tract (or alimentary canal) is known as Peristaltic movements.