Peristalsis (Gr. Peri - Around, Stalsis - Contraction)

Peristalsis is the rhythmic waves of muscle contraction in the walls of hollow tubular organs, such as the ureter or parts of the digestive tract.

Peristalsis ensures the movement of contents through these organs. Rhythmic contractions of the muscle layer of the organ wall create a compression wave that propels the contents forward towards the exit.

Thus, in the digestive tract, peristalsis helps move food through the esophagus, stomach, and intestines, ensuring its movement and mixing with digestive juices. In the ureters, peristalsis moves urine from the kidneys to the bladder.

The rhythm and strength of peristalsis is regulated by the autonomic nervous system and various hormones. Peristalsis disorders can lead to the development of a number of diseases of the digestive system, urinary system and others.