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Dorsal mesentery, of the jejunal and ileal loops, forms the mesentery proper. [6] The ventral mesentery, located in the region of the terminal part of the esophagus, the stomach and the upper part of the duodenum, is derived from the septum transversum.
Mesentery in red. Dorsal mesentery is the lower part of the circuit. The upper part is ventral mesentery. Abdominal part of digestive tube and its attachment to the primitive or common mesentery. Human embryo of six weeks. Schematic figure of the bursa omentalis, etc. Human embryo of eight weeks.
The ventral mesentery forms the lesser omentum, and is attached to the developing liver. In the adult, these connective structures of omentum and mesentery form the peritoneum , and act as an insulating and protective layer while also supplying organs with blood and lymph vessels as well as nerves. [ 29 ]
Dorsal mesentery: Mesentery proper: Small intestine (jejunum and ileum) Posterior abdominal wall: Superior mesenteric artery, accompanying veins, autonomic nerve plexuses, lymphatics, 100–200 lymph nodes and connective tissue with fat Transverse mesocolon: Transverse colon: Posterior abdominal wall: Middle colic: Sigmoid mesocolon: Sigmoid ...
Its two attachments are commonly referred to as the dorsal mesogastrium and the ventral mesogastrium. As the stomach rotates during early development, the dorsal and ventral mesentery rotate with it; this rotation produces a space anterior to the expanding stomach called the greater sac, and a space posterior to the stomach called the lesser sac.
Two of the stages in the development of the digestive tube and its mesentery. The arrow indicates the entrance to the bursa omentalis. The greater omentum develops from the dorsal mesentery that connects the stomach to the posterior abdominal wall. During its development, the stomach undergoes its first 90° rotation along the axis of the ...
In vertebrates, a mesentery is a membrane consisting of a double fold of peritoneum that encloses the intestines and their associated organs and connect them with the dorsal wall of the abdominal cavity. [2] In invertebrates, a mesentery is a support or partition in a body cavity serving a similar function to the mesenteries of vertebrates. [2]
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