Digestion Tract: GIT

Stomach is the expanded part of the alimentary canal. It has the same organization as the remaining gut (mucosa, submucosa, muscularis, serosa). The inner surface has longitudinal folds called rugae, which are poorly developed in the upper stomach but more elaborate in the lower part. They disappear when the stomach is distended to accommodate expansion. Numerous openings are seen in the mucosal surface called gastric pits or foveolae>, which are easily seen in scanning electron microscopy (SEM). Gastric glands empty into the bottom of gastric pits.

Fundic Glands are composed of 4 functional cell types: