GENERAL HISTOLOGY

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: -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-3: -Peristalsis: The movement of food in the alimentary canal is mediated by the process called peristalsis. It is a type of involuntary muscular movement that occurs in the digestive system. It begins with the swallowing of food in the mouth and propulsion throughout the gastrointestinal tract.