Anatomy and Physiology of the Stomach and Pylorus
The stomach is divided into four segments that are important guides when you plan a surgical resection: (1) the cardia; (2) the fundus; (3) the corpus or body; and (4) the antrum. The cardia is the most proximal part of the stomach located immediately after the gastroesophageal junction. The fundus is the region of the stomach that extends above the gastroesophageal junction. The corpus or body lies between the fundus and the antrum and is marked distally by the angularis incisura, a notch on the lesser curvature of the stomach located near to the pyloric end. The last segment is the antrum, which extends from the corpus or body to the pyloric sphincter, a thick muscular valve that separates the antrum from the duodenum. Each of these segments has histologic differences and is involved in unique roles in the process of digestion.
KeywordsStomach Pylorus Anatomy Physiology Drainage Acid secretion Gastric acid
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