Write a note on peristalsis and sphincter function in stomach. (AS1)

Peristalsis:

a) Peristalsis is the contraction and relaxation of the muscles of the stomach in a wave like motion that propels the food mass further n the alimentary canal.

b) In stomach, the peristaltic movements bring about the complete mixing of food with the digestive juices secreted such as HCl, Mucus and various enzymes.

c) It also helps in further movement of chyme from the food into the intestines.

Sphincter:

a) The pyloric sphincter present at the end of the stomach controls the flow of chyme from the stomach to the duodenum.