Corpus: thick-walled, glandular section. Its walls have secretory glands that produce digestive enzymes and mucus. Digestion begins in the corpus. The pyloric sphincter controls the movement of food from the corpus to the intestines (specifically, the duodenum).

Diagram of the rat's stomach. Adapted from Moore 2000

The forestomach and the corpus are separated by a low fold of tissue called the limiting ridge

At the esophagus, the course of the limiting ridge bends into a U-shape and almost surrounds the esophageal opening

The esophagus is closed off from the stomach by the gastroesophageal barrier, which consists of the crural sling, the lower esophageal sphincter, and the several centimeters of intraabdominal esophagus that lie between them

Humans also have a crural sling and an esophageal sphincter, but ours are placed right on top of one another