What is the mesentery composed of?
Peritoneum, Mesentery, and Omentum. The peritoneum is thin membrane that lines the abdominal and pelvic cavities, and covers most abdominal viscera. It is composed of layer of mesothelium supported by a thin layer of connective tissue.
Mesentery: In general, a fold of tissue that attaches organs to the body wall. The word mesentery usually refers to the small bowel mesentery, which anchors the small intestines to the back of the abdominal wall. Blood vessels, nerves, and lymphatics branch through the mesentery to supply the intestine.
- The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to pass from the stomach to the small intestine.
- The pyloric sphincter is a band of smooth muscle at the junction between the pylorus of the stomach and the duodenum of the small intestine. It plays an important role in digestion, where it acts as a valve to controls the flow of partially digested food from the stomach to the small intestine.
- The spleen plays multiple supporting roles in the body. It acts as a filter for blood as part of the immune system. Old red blood cells are recycled in the spleen, and platelets and white blood cells are stored there. The spleen also helps fight certain kinds of bacteria that cause pneumonia and meningitis.
The thing in your abdomen that helps keep everything in place is called the Mesentery. While keeping things in place, the Mesentery also handles the blood supply for the intestines. The liver has its own arterial blood supply, but has Mesentery that hold it in place. All the abdominal organs use this connective tissue.
- Mesentery: In general, a fold of tissue that attaches organs to the body wall. The word mesentery usually refers to the small bowel mesentery, which anchors the small intestines to the back of the abdominal wall. Blood vessels, nerves, and lymphatics branch through the mesentery to supply the intestine.
- Mesentery Proper. The mesentery of the small intestine is a large and broad fan-shaped mesentery that is attached to the jejunum and ileum of the small intestine, connecting them to the posterior abdominal wall.
- The root of the mesentery extends from the duodenojejunal flexure to the ileocaecal junction. This section of the small intestine is located centrally in the abdominal cavity and lies behind the transverse colon and the greater omentum.
The blood vessels, lymphatics and nerves that are required to supply the jejunum and ileum are found between the two layers of the peritoneum that make up the mesentery of the small intestine.
- The small bowel mesentery is a broad fan-shaped fold of peritoneum connecting the loops of jejunum and ileum to the posterior abdominal wall and is one of the four mesenteries in the abdominal cavity.
- Scientists recently discovered what they are calling a new human organ that exists in the digestive system. Named the mesentery, the organ was previously thought to consist of fragmented and disparate structures.
- The falciform ligament, which is located on the left of the midline of the abdomen, runs through the anterior wall of the abdomen and diaphragm. It is one of the anatomical structures which attaches the liver to the remnants of the umbilical veins.
Updated: 2nd October 2019