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

The answer is option (d).

The swallowed food moves downwards in the alimentary canal because of the contraction of muscles in the wall of food pipe. Food is pushed down by movement of the wall of the foodpipe. Actually, this movement takes place throughout the alimentary canal and pushes the food downwards This is known as peristalsis. Itbegins in the oesophagus when food is swallowed.