PATHOLOGY

Detailed explanation-1: -Peristalsis is the involuntary contraction and relaxation of longitudinal and circular muscles throughout the digestive tract, allowing for the propulsion of contents beginning in the pharynx and ending in the anus.

Detailed explanation-2: -Because of the reliance of the peristaltic reflex on the myenteric plexus, it is also referred to as the myenteric reflex.

Detailed explanation-3: -Peristaltic waves push the swallowed bolus down the esophagus. In the stomach, peristalsis churns swallowed food, mixing it with gastric juices. These mechanical and chemical actions further break down food into a substance called chyme.

Detailed explanation-4: -Waves of muscle contractions called peristalsis (per-uh-STALL-sus) force food down through the esophagus to the stomach. A person usually isn’t aware of the muscle movements that push food through the digestive tract. The stomach: At the end of the esophagus is a muscular ring or valve called a sphincter (SFINK-ter).