Small bowel mesentery

Changed by Mark Thurston, 10 Mar 2017

Updates to Article Attributes

Body was changed:

The small bowel mesenteryis 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.

Its connection with It is connected to the posterior abdominal wall, by its root, which measures about 15 cm andextends obliquely from the duodenojejunal flexure on the left of thesecond lumbar vertebra to the right lower quadrant anterior to theupper part of the right sacroiliac joint.

The root is a bare area continuous with the left anterior pararenalspace superiorly, and the right anterior pararenal space inferiorly. Inits course, it passes from left to right, successively in front of thehorizontal part of the duodenum (where the superior mesenteric vesselsenter the mesentery), the abdominal aorta, the inferior vena cava, theright ureter and the right psoas muscle. It suspends 20 -25 feet ofsmall bowel.

The intestinal border of the mesentery is characteristically throwninto a number of pleats or frills. The mesentery consists of two layersof peritoneum between which lie the jejunal and ileal branches of thesuperior mesenteric arteries and their accompanying veins, nerves andlymphatics.

  • -<p>The <strong>small bowel mesentery</strong>
  • -is a broad fan-shaped fold of <a href="/articles/peritoneum">peritoneum</a> connecting the loops of
  • -<a href="/articles/jejunum_(textbook)">jejunum</a> and <a href="/articles/ileum">ileum</a> to the posterior abdominal wall and is one of the four <a href="/articles/mesentery">mesenteries</a> in the <a href="/articles/abdominal-cavity">abdominal cavity</a>.</p><p>Its connection with
  • -the posterior abdominal wall, its root, measures about 15 cm and
  • -extends obliquely from the duodenojejunal flexure on the left of the
  • -second lumbar vertebra to the right lower quadrant anterior to the
  • -upper part of the right <a href="/articles/sacroiliac-joint">sacroiliac joint</a>.</p><p>The root is a bare area continuous with the left anterior pararenal
  • -space superiorly, and the right anterior pararenal space inferiorly. In
  • -its course, it passes from left to right, successively in front of the
  • -horizontal part of the <a href="/articles/duodenum">duodenum</a> (where the superior mesenteric vessels
  • -enter the mesentery), the abdominal aorta, the inferior vena cava, the
  • -right ureter and the right psoas muscle. It suspends 20 -25 feet of
  • -small bowel.</p><p>The intestinal border of the mesentery is characteristically thrown
  • -into a number of pleats or frills. The mesentery consists of two layers
  • -of peritoneum between which lie the jejunal and ileal branches of the
  • -superior mesenteric arteries and their accompanying veins, nerves and
  • -lymphatics.</p>
  • +<p>The <strong>small bowel mesentery</strong> is a broad fan-shaped fold of <a href="/articles/peritoneum">peritoneum</a> connecting the loops of <a title="Jejunum" href="/articles/jejunum">jejunum</a> and <a href="/articles/ileum">ileum</a> to the posterior abdominal wall and is one of the four <a href="/articles/mesentery">mesenteries</a> in the <a href="/articles/abdominal-cavity">abdominal cavity</a>.</p><p>It is connected to the posterior abdominal wall by its root which measures about 15 cm and extends obliquely from the duodenojejunal flexure on the left of the second lumbar vertebra to the right lower quadrant anterior to the upper part of the right <a href="/articles/sacroiliac-joint">sacroiliac joint</a>.</p><p>The root is a bare area continuous with the left anterior pararenal space superiorly, and the right anterior pararenal space inferiorly. In its course, it passes from left to right, successively in front of the horizontal part of the <a href="/articles/duodenum">duodenum</a> (where the superior mesenteric vessels enter the mesentery), the abdominal aorta, the inferior vena cava, the right ureter and the right psoas muscle. It suspends 20 -25 feet of small bowel.</p><p>The intestinal border of the mesentery is characteristically thrown into a number of pleats or frills. The mesentery consists of two layers of peritoneum between which lie the jejunal and ileal branches of the superior mesenteric arteries and their accompanying veins, nerves and lymphatics.</p>

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