Side view of the tummy (abdomen) showing the peritoneum - long description

The illustration shows a side view of the tummy, which is also called the abdomen. The person is facing to the left. It shows the internal organs in the tummy, including the liver, the stomach and the bowel. These are surrounded by the peritoneum, which is a thin membrane. The peritoneum has two layers. The outer layer lines the wall of the tummy, and the inner layer covers the internal organs. There is a small space between these layers, called the peritoneal cavity.