![]() ![]() ![]() Mass movements are stronger and serve to move the chyme to the rectum quickly.Ībsorption of water occurs by osmosis. Haustral contraction is activated by the presence of chyme and serves to move food slowly to the next haustra, along with mixing the chyme to help with water absorption. Haustra are saccules in the colon that give it its segmented appearance. There are 2 types of motility present in the colon, haustral contraction and mass movement. These layers contribute to the motility of the large intestine. The muscular layer is made up of 2 layers of smooth muscle, the inner, circular layer, and the outer, longitudinal layer. The 4 layers of the large intestine from the lumen outward are the mucosa, submucosa, muscular layer, and serosa. The intestinal wall is made up of multiple layers.
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