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The duodenum is a short portion of the small intestine connecting it to the stomach. It is about 10 inches (25 cm) long, while the entire small intestine measures about 20 feet (6.5 meters).
medical Definition of cementum : a specialized external bony layer covering the dentin of the part of a tooth normally within the gum â called also cement; compare dentin, enamel Illustration of cementum