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Unformatted text preview: Large Intestine The large intestine is about 1.5 m (5 feet) long and is characterized by the following components: • The cecum is a dead-end pouch at the beginning of the large intestine, just below the ileocecal valve. • The appendix (vermiform appendix) is an 8-cm (3-inch) long, fingerlike attachment to the cecum that contains lymphoid tissue and serves immunity functions. • The colon, representing the greater part of the large intestine, consists of four sections: the ascending, transverse, descending, and sigmoid colons. At regular distances along the colon, the smooth muscle of the muscularis layer causes the intestinal wall to gather, producing a series of pouches called haustra. The epithelium facing the lumen of the colon is covered with openings of tubular intestinal glands that penetrate deep into the thick mucosa. The glands consist of absorptive cells and goblet cells. The absorptive cells thick mucosa....
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This note was uploaded on 11/10/2011 for the course PT 101 taught by Professor Staff during the Spring '10 term at Texas State.
- Spring '10