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Haustration is the mixing of feces to expose it to the surface of intestine to absorb water.

they are sac like structures foldings in large intestine. At each of these constrictions, about 2.5 centimeters of the circular muscle contracts, sometimes constricting the lumen of the colon almost to occlusion. At the same time, the longitudinal muscle of the

colon, which is aggregated into three longitudinal strips called the teniae coli, contracts. These combined contractions of the circular and longitudinal strips of

muscle cause the unstimulated portion of the large intestine to bulge outward into baglike sacs called haustrations.

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