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Stomach
24.7--Stomach
Term | Definition |
---|---|
Stomach | J-Shaped enlargement of GI tract. Covers epigastric, umbilical and left hypochondriac regions of abdomin; connects to duodenum |
Cardia | Surrounds superior opening of stomach |
Fundus | Rounded portions; superior and left of cardia |
Body | Central Portion |
Pyloric Part | Pyloric antrum, pyloric canal, pylorus (body-->duodenum) |
Rugae | Large folds; empty stomach |
Functions of Stomach | 1) Mixes Saliva, food, and gastric juices = chyme 2) Reservoir for food 3) Gastric juic secretion with HCL, pepsin, intrinsic factor, and gastric lipase 4) Gastrin into blood |
Cardioesophageal Junction | In between stomach and esophagus; mucosa abruptly changes |
Surface Mucous Cells | Secrete mucus; form protective barrier that prevents digestion of stomach |
Parietal Cells | HCL secretion --> kills microbes in food; denatures proteins; turns pepsinogen into pepsin |
Chief Cells | Secretes pepsinogen, gastric lipase and intrinsic factor; |