Middle rectal veins
The middle rectal veins (or middle hemorrhoidal vein) take origin in the hemorrhoidal plexus and receive tributaries from the bladder, prostate, and seminal vesicle.
| Middle rectal veins | |
|---|---|
 Scheme of the anastomosis of the veins of the rectum | |
| Details | |
| Drains from | rectum |
| Drains to | internal iliac vein |
| Artery | middle rectal artery |
| Identifiers | |
| Latin | venae rectales mediae |
| TA98 | A12.3.10.018 |
| TA2 | 5030 |
| FMA | 70912 |
| Anatomical terminology | |
They run lateralward on the pelvic surface of the levator ani to end in the internal iliac vein. Veins superior to the middle rectal vein in the colon and rectum drain via the portal system to the liver. Veins inferior, and including, the middle rectal vein drain into systemic circulation and are returned to the heart, bypassing the liver.
References
This article incorporates text in the public domain from page 676 of the 20th edition of Gray's Anatomy (1918)
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