GASTROINTESTINAL SYSTEM (GI Tract).
General Organization, Esophagus and Stomach.
Barry R. J. Rittman, Ph.D
Gartner and Hiatt Chapter 14, p277; Sheedlo, Chapter 14, p134-138
Understand the organization of the four layers of the Gastrointestinal tract.
Describe the 4 layers of the esophagus, with emphasis on the epithelium and the location of the
gland types in the underlying layers.
Describe unique features of the tunica muscularis of the esophagus and stomach.
List histologic characteristics common to glands throughout the stomach.
Name gland types in the different zones of the stomach.
List their differences based on pit and gland length. gland shape, cell types, and function.
List cell types, found in gastric glands, and know the functions of each.
Tunica mucosa, lamina propria, submucosa, muscularis, adventitia, serosa, Meissner’s
plexus, Auerbach’s plexus, esophageal and mucosal glands, parietal cells and chief cells.
The gastrointestinal tract (=digestive tract), consists of a tube and associated glands and organs
that have arisen from the epithelium of
the primitive gut.
The following notes refer only to the esophagus, stomach, small intestine, large intestine,
appendix and anal canal.
The 4 basic layers are shown above
Tunica Adventitia or