Structure and Function of the Stomach

Structure of the stomach

The stomach lies in the upper abdominal cavity, just below the diaphragm. It is continuous with the oesophagus at the cardiac sphincter and the duodenum at the pyloric sphincter. It is divided into three regions: the fundus, body and the antrum. The walls of the stomach are made up of muscle layer (longitudinal, circular and oblique muscle), submucosa and mucosa.

Functions of the stomach

These include:

Secretion and functions of gastric juice

There is always a small amount of gastric juices in the stomach, even when it contains no food. Secretion reaches its maximum level about one hour after a meal.

About two litres of gastric juices are secreted daily by glands in the mucosa. Gastric juice consists of: