Write briefly a about the functional and structural aspects of esophagus

Explanation

1) esophagus is a long muscular and elastic tube-like part of the digestive system which lies between pharynx and stomach.
2) The wall of the esophagus is made up of two kinds of smooth muscles.
3) The inner layer consists of circular muscles and the outer layer of longitudinal muscles.
4) The walls of the esophagus secrete mucus , a slimy substance which helps in the easy movement of food into the stomach.
5) Walls of esophagus carry on wave-like movement by contraction and relaxation These movements are known as peristalsis.
6) Due to the peristalsis movements food passes from esophagus into stomach.