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In anatomy, the ileal vessels are the arteries and veins which supply or drain the ileum, the final section of the small intestine. [1] These are: Unnamed branches of the superior mesenteric artery (see also intestinal arteries) Unnamed tributaries of the superior mesenteric vein
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 jejunal arteries are four-five branches of the superior mesenteric artery [1] which supply blood to the jejunum. [ citation needed ] They arise from the left side of the superior mesenteric artery.
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.
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 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 ...
The ileocolic artery is the lowest branch arising from the concavity of the superior mesenteric artery.It supplies the cecum, ileum, and appendix. It passes downward and to the right behind the peritoneum toward the right iliac fossa, where it divides into a superior and an inferior branch: the inferior gives rise to the appendicular artery and anastomoses with the end of the superior ...