What is a mesentry?

A mesentery is a double-layered fold of the peritoneum that connects certain abdominal organs to the posterior abdominal wall. It consists of two peritoneal layers which enclose connective tissues, blood vessels, lymphatic vessels, and nerves as they supply certain organs. Mesenteries are found throughout the abdominal cavity, and support, stabilise, and provide space for organs such as the stomach, small intestine, colon, and rectum. Different types of mesenteries include:

- Mesentery of the small intestine (mesenterium): Connects the small intestines to the posterior abdominal wall.

- Mesocolon: Includes several mesenteries that connect the colon to the posterior body wall:

- Transverse mesocolon: Supports the transverse colon.

- Mesocolon ascendens: Connects the ascending colon to the abdominal wall.

- Mesocolon descendens: Supports the descending colon.

- Sigmoid mesocolon: Attaches the sigmoid colon to the abdominal wall.

- Mesentery of the stomach (greater omentum): Largest peritoneal fold derived from the mesentery of the stomach, drapes over abdominal organs, and contains fat.

- Mesorectum: Supports and stabilises the rectum and helps secure it to the pelvic floor.

Mesenteries play a vital role in supplying blood, lymphatic vessels, and nerves to abdominal organs, helping to sustain their function and providing structural support within the abdominal cavity. They also assist in organ mobility, allowing for movement during digestion and other processes.