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Unformatted text preview: Pharynx The pharynx consists of the nasopharynx, oropharynx, and laryngopharynx. Esophagus The esophagus connects the pharynx to the stomach. The upper and lower esophageal sphincters regulate movement. Stomach The stomach has a cardiac opening from the esophagus and a pyloric opening into the duodenum. The wall of the stomach consists of three muscle layers: longitudinal, circular, and oblique. Gastric glands produce mucus, hydrochloric acid, pepsin, gastrin, and intrinsic factor. Small Intestine The small intestine is divided into the duodenum, jejunum, and ileum. Circular folds, villi, and microvilli greatly increase the surface area of the intestinal lining. Goblet cells and duodenal glands produce mucus....
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- Fall '10