QS Study

Peritoneal folds of the Gut

The peritoneum is a membrane made up of two layers. One layer lines the cavity and the other layer lines the organs. It resembles the pleura and serous pericardium in including parietal and visceral layers. It helps support the organs in the abdominal cavity and also allows nerves, blood vessels, and lymph vessels to pass through to the organs.

Fig: Peritoneal folds of the Gut

The peritoneal folds suspend numerous organs within the abdomen. Within the abdominal cavity, these organs are mobile. The degree and instructions of their mobility depend upon the size and instructions of the folds. The peritoneal folds are:

(1) Omentum: The omenta are sheets of visceral peritoneum that extend from the stomach and proximal part of the duodenum to other abdominal organs. Two types (a) Greater omentum and (b) Lesser omentum.

(2) The mesentery It connects an intraperitoneal organ to the posterior abdominal wall. It provides a pathway for nerves, blood vessels and lymphatics to travel from the body wall to the viscera.

(3) Transverse mesocolon – It is a broad, meso-fold of the peritoneum, which connects the transverse colon to the posterior wall of the abdomen.

(4) Mesoappendix – It encloses the appendicular artery and vein, as well as lymphatic vessels, nerves, and often a lymph node.

(5) Sigmoid mesocolon – It is the fold of peritoneum which retains the sigmoid colon in connection with the pelvic wall.

These are formed by the visceral layer of the peritoneum. The peritoneal folds likewise give pathways for passage to nerves, vessels, and lymphatics apart from enabling mobility to organs.

Related Study: