HUMAN NUTRITION

Detailed explanation-1: -Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract. It starts in the esophagus where strong wave-like motions of the smooth muscle move balls of swallowed food to the stomach.

Detailed explanation-2: -They involve both the circular muscles that ring the tubes of your digestive tract and also longitudinal muscles that span the walls of the tubes. The circular muscles squeeze and expand in a synchronized way to push the food through the tube while the longitudinal muscles propel everything forward.

Detailed explanation-3: -Peristalsis in the digestive tract begins in the esophagus. After food is swallowed, it is moved down the esophagus by peristalsis. The muscles in the stomach, small intestine, and large intestine continue the process.