The movement of separate segments of the wall of the intestine to mix digestive juice with the food before it is passed along by the action of peristalsis.
The intricate process of the gastrointestinal system involves various movements to digest food. One such movement is the peristaltic action, which occurs in the small intestine. This action is facilitated by the contraction and relaxation of circular muscles, which push the food mass back and forth along the digestive tract.
Division into numerous small segments.