ANATOMY

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: -Peristalsis is the automatic wave-like movement of the muscles that line your gastrointestinal tract. Peristalsis moves food through your digestive system, beginning in your throat when you swallow and continuing through your esophagus, stomach and intestines while you digest.

Detailed explanation-3: -A series of normal coordinated, rhythmic muscle contractions, that occurs automatically to move food through the digestive tract is called peristalsis.

Detailed explanation-4: -The parasympathetic nervous system (PNS) stimulates peristalsis via the myenteric plexus. The afferent (sensory) nerves of the myenteric plexus deliver information to interneurons within the plexus. Interneurons communicate with efferent nerves, stimulating an action potential (spike-wave) within smooth muscle cells.

Detailed explanation-5: -The peristaltic movement is initiated from the oesophagus when the food is completely swallowed which includes the reflexive action of the longitudinal and circular muscles greatly in the digestive sites and some other times in hollow tubes that are present in progressive wave-like contractions.