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: -Your salivary glands make saliva, a digestive juice, which moistens food so it moves more easily through your esophagus into your stomach. Saliva also has an enzyme that begins to break down starches in your food. Esophagus. After you swallow, peristalsis pushes the food down your esophagus into your stomach.