Median sacral artery

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Artery: Median sacral artery
Gray531.png
The abdominal aorta and its branches. (Middle sacral visible at center bottom.)
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The arteries of the pelvis. (Middle sacral labeled at upper right.)
Latin arteria sacralis mediana
Gray's p.613
Supplies coccyx, lumbar vertebrae, sacrum
Source abdominal aorta
Vein Median sacral vein

The median sacral artery (or middle sacral artery) is a small vessel that arises posterior to the abdominal aorta and superior to its bifurcation.

It descends in the middle line in front of the fourth and fifth lumbar vertebræ, the sacrum and coccyx, ending in the glomus coccygeum (coccygeal gland).

From it minute branches pass to the posterior surface of the rectum.

On the last lumbar vertebra it anastomoses with the lumbar branch of the iliolumbar artery; in front of the sacrum it anastomoses with the lateral sacral arteries, sending offshoots into the anterior sacral foramina.

It is crossed by the left common iliac vein and accompanied by a pair of venæ comitantes; these unite to form a single vessel that opens into the left common iliac vein.

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This article incorporates text from a public domain edition of Gray's Anatomy.