The wall of the stomach consists of a mucosa, submucosa, muscularis and serosa tunics. The true gastric mucosa is characterized by the presence of gastric glands.
Only the stomach of man and carnivores are lined by gastric mucosa exclusively.
In solipeds and swine the oesophageal portion of the stomach bears a cutaneous mucosa (stratified squamous epithelium). Ruminants have a stomach consisting of four compartments, three nonglandular diverticula comprising the fore stomach and a true glandular stomach.
- The forestomach consists of three compartments,
- Rumen
- Reticulum
- Omasum
