inferior mesenteric artery

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in·fe·ri·or mes·en·ter·ic ar·ter·y

[TA]
origin, at the L3 vertebral level as the third and smallest anterior visceral branch of the abdominal aorta; branches, left colic, sigmoid, superior rectal; anastomoses, middle colic and middle rectal.

in·fe·ri·or mes·en·ter·ic ar·te·ry

(in-fēr'ē-ŏr mez'en-ter'ik ahr'tĕr-ē) [TA]
Origin, abdominal aorta; branches, left colic, sigmoid, superior rectal; anastomoses, middle colic and middle rectal.
Synonym(s): arteria mesenterica inferior.

inferior mesenteric artery

The third unpaired midline artery that branches from the abdominal aorta; it originates 3 to 4 cm proximal to the aortic bifurcation. It supplies blood to the hindgut, i.e., the distal half of the transverse colon, the descending colon, the sigmoid colon, and the rectum. Its branches include the left colic, sigmoid, and superior rectal arteries.
See: aorta (Branches of aorta), circulation (Circulation of blood through heart and major vessels) for illus.
See also: artery