pinches the intestine into compartments, which mixes chyme with digestive juices for their chemical digestion and absorption. Unlike peristalsis, segmentation does not result in a net movement of chyme. (1) During segmentation, the circular muscle layer pinches off the small intestine into compartments, or “segments”, which separates larger masses of chyme. (2) The circular layer pinches to even smaller small intestine segments, further breaking up undigested food and moving it back and forth like an agitator in a washing machine. (3) By repeatedly dividing undigested food particles and sloshing them back and forth, they become thoroughly mixed with digestive juices.