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The ileal arteries are 12 branches of the superior mesenteric artery [1] which supply blood to the ileum. [ citation needed ] They arise from the left side of the superior mesenteric artery. [ 1 ]
Vasa recta are straight arteries arising from arterial arcades (anastomoses of the jejunal and ileal arteries, branches of superior mesenteric artery) in the mesentery of the jejunum and ileum that supply the jejunum and ileum. [1] The vasa recta of the jejunum are long and few, compared to the ileum where they are numerous and short.
The remaining ileum, which is of varying length, survives on a single mesenteric artery, which it is twisted around in a spiral form. [1] The term apple-peel intestinal atresia is generally reserved for when it affects the jejunum, [10] [11] while Christmas tree intestinal atresia is used if it affects the duodenum. It may affect both, however.
From this first set of arches branches arise, which unite with similar branches from above and below and thus a second series of arches is formed; from the lower branches of the artery, a third, a fourth, or even a fifth series of arches may be formed, diminishing in size the nearer they approach the intestine.
The number of arterial arcades in the ileum is more than the number of arcades in the jejunum. [1] The middle, right, and ileocecal branches anastomose with each other to form a marginal artery along the inner border of the colon. This artery is completed by branches of the left colic which is a branch of the inferior mesenteric artery.
The arterial arcades (intermesenteric arterial anastomoses or Riolan arcades [1]) are a series of anastomosing arterial arches between the arterial branches of the jejunum and ileum. Nearest the duodenum the mesenteric loops are primary, the vasa recta are long and regular in distribution, and the translucent spaces (lunettes) are extensive.
The jejunum and ileum receive blood from the superior mesenteric artery. [14] Branches of the superior mesenteric artery form a series of arches within the mesentery known as arterial arcades, which may be several layers deep. Straight blood vessels known as vasa recta travel from the arcades closest to the ileum and jejunum to the organs ...
Primary vascular causes of bowel infarction, also known as mesenteric ischemia, are due to blockages in the arteries or veins that supply the bowel.Types of mesenteric ischemia are generally separated into acute and chronic processes, because this helps determine treatment and prognosis.