Middle anorectal veins
Venae anorectales mediae
- Latin synonym: Venae rectales mediae
- Synonym: Middle rectal veins; Middle hemorrhoidal vein
- Related terms: Middle rectal veins
Definition
The middle anorectal veins (or middle hemorrhoidal vein) take origin in the hemorrhoidal plexus and receive tributaries from the bladder, prostate, and seminal vesicle.
They run lateralward on the pelvic surface of the levator ani to end in the internal iliac vein.
The veins superior to the middle rectal vein in the colon and rectum drain via the portal system to the liver. The veins inferior, and including, the middle rectal vein drain into systemic circulation and are returned to the heart, by passing the liver.
Source : Wikipedia
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