Median sacral artery
| Median sacral artery | |
|---|---|
| File:Gray531.png The abdominal aorta and its branches. (Middle sacral visible at center bottom.) | |
| File:Gray539.png The arteries of the pelvis. (Middle sacral labeled at upper right.) | |
| Details | |
| Source | Abdominal aorta |
| Vein | Median sacral vein |
| Supplies | Coccyx, lumbar vertebrae, sacrum |
| Identifiers | |
| Latin | arteria sacralis mediana |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
The median sacral artery (or middle sacral artery) is a small artery that arises posterior to the abdominal aorta and superior to its bifurcation.
Structure
[edit | edit source]The median sacral artery arises from the abdominal aorta at the level of the bottom quarter of the third lumbar vertebra.[1] It descends in the middle line in front of the fourth and fifth lumbar vertebrae, the sacrum and coccyx, ending in the glomus coccygeum (coccygeal gland).
Minute branches pass from it, 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 venae comitantes; these unite to form a single vessel that opens into the left common iliac vein.
Development
[edit | edit source]The median sacral artery is morphologically the direct continuation of the abdominal aorta.[2] It is vestigial in humans, but large in animals with tails, such as the crocodile.
See also
[edit | edit source]Additional images
[edit | edit source]-
The iliac veins. -
Scheme of the anastomosis of the veins of the rectum. -
The relations of the viscera and large vessels of the abdomen. -
Median sacral artery
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Pelvic contents: male. Superior view. Deep dissection.
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Median Sacral Artery
References
[edit | edit source]Public domain This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
External links
[edit | edit source]- Anatomy photo:40:11-0200 at the SUNY Downstate Medical Center - "Posterior Abdominal Wall: Branches of the Abdominal Aorta"
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (pelvicarteries)
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