mesentery

enUK

mesentery:

see peritoneumperitoneum
, multilayered membrane which lines the abdominal cavity, and supports and covers the organs within it. The part of the membrane that lines the abdominal cavity is called the parietal peritoneum.
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Mesentery

(mesenterium), a ligament that suspends and fastens the intestines in the body cavity of humans and animals having a coelom (secondary body cavity). The mesentery arises in the embryo from the internal layers of the lateral plates. These layers, growing together over and under the intestinal canal, form two mesenteries—the dorsal and ventral. Only one of these is usually preserved in the adult organism. In invertebrates (segmented worms) the dorsal mesentery is most often reduced and the ventral one is preserved. In vertebrates the dorsal mesentery is most often preserved. Only fishes of the sturgeon family have a ventral mesentery of the intestinal tract; in remaining vertebrates its vestiges are represented by the falciform ligament of the liver. Each lamina of the mesentery in vertebrates consists of a surface layer of squamous epithelial cells and an internal layer of connective tissue. Between the laminae of the mesentery, in the fatty areolar cellular tissue, are located the lymph nodes and also the nerves passing to the intestines, blood vessels, and lymphatic vessels. On the wide folds of the mesentery, along the intestinal loops, the omenta are formed.

In man the mesentery is a fold of the peritoneum, which covers the crus of each intra-abdominal organ; it is also by means of the mesentery that each of these organs is attached to the wall of the abdominal cavity. Outwardly, the mesentary resembles on old-fashioned collar with gathers, bryzhy (from Polish bryże), from which the Russian term bryzheika originated. Depending on the organ, the mesentery acquires a supplementary designation, for example, mesocolon and mesentery of the uterus. The mesentery is fixed at the place where it emerges from the intestinal wall (mesentery root); the other end, to which the intestines are attached, is free and easily movable. Disease processes that arise in the internal organs (edema, phlebitis, tumors, and so forth) cause intense changes in their mesenteries. Traumas of the mesentery are observed in bruises of the abdomen, strangulated hernias, and puncture wounds of the abdominal cavity.

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mesentery

[′mez·ən‚ter·ē] (anatomy) A fold of the peritoneum that connects the intestine with the posterior abdominal wall.

mesentery

enUK

mesentery

[mes´en-ter″e] 1. a membranous fold attaching an organ to the body wall.2. the peritoneal fold attaching the small intestine to the dorsal body wall; called also mesenterium. adj., adj mesenter´ic.

mes·en·ter·y

(mes'en-ter'ē), [TA] 1. A double layer of peritoneum attached to the abdominal wall and enclosing in its fold a portion or all of one of the abdominal viscera, conveying to it its vessels and nerves. 2. The fan-shaped fold of peritoneum suspending the greater part of the small intestines (jejunum and ileum) and attaching it to the posterior abdominal wall at the root of the mesentery (radix mesenterii). Synonym(s): mesenterium dorsale commune, mesostenium Synonym(s): mesenterium [TA] [Mod. L. mesenterium, fr. G. mesenterion, fr. G. mesos, middle, + enteron, intestine]

mesentery

(mĕz′ən-tĕr′ē, mĕs′-)n. pl. mesenter·ies Any of several folds of the peritoneum that connect the intestines to the dorsal abdominal wall, especially such a fold that envelops the jejunum and ileum.

mes′en·ter′ic adj.

mesentery

The double layer of peritoneum which covers abdominal organs and suspends the small intestine south of the ligament of Treitz—i.e., the jejunum and the ileum.
Pronunciation
Medspeak-UK: pronounced, MEE sen terry
Medspeak-US: pronounced, MEH sen terry
Many in the UK pronounce this the same as in the US.

mes·en·ter·y

(mes'ĕn-ter-ē) [TA] 1. A double layer of peritoneum attached to the abdominal wall and enclosing in its fold a portion or all of one of the abdominal viscera, conveying to it its vessels and nerves. 2. The fan-shaped fold of peritoneum encircling the greater part of the small intestines (jejunum and ileum) and attaching it to the posterior abdominal wall at the root of the mesentery (radix mesenterii).
Synonym(s): mesenterium. [Mod. L. mesenterium, fr. G. mesenterion, fr. G. mesos, middle, + enteron, intestine]

mesentery

The complex, double-layered folded curtain of PERITONEUM that encloses the bowels and by which they are suspended from the back wall of the abdomen. Blood and lymphatic vessels run to and from the intestines between the two layers of the mesentery.

mesentery

the layers of PERITONEUM that attach the gut system and its associated organs (e.g. SPLEEN) to the dorsal surface of the peritoneal cavity in mammals. The blood, lymph and nerve supplies to the gut are contained in the mesentery.
one of the filaments dividing the body cavity of sea anemones and corals.

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Words related to mesentery

noun a double layer of peritoneum that attaches to the back wall of the abdominal cavity and supports the small intestines

Related Words