Valvulae Conniventes

The valvulae conniventes are large folds or valvular flaps projecting into the lumen of the bowel. They are composed of reduplications or folds of the mucous membrane, the two layers of the fold being bound together by submucous tissue, they contain no muscular fibers, and, unlike the folds in the stomach, they are permanent, and not obliterated when the intestine is distended. Shown is valvulae conniventes is the upper part of the small intestine.

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