Veins of the rectum (English)

Veins of the rectum and anal canal (posterior view, sacrum removed). The three anorectal veins (a.k.a.rectal/hemorrhoidal veins) follow the same path as arteries, draining into the corresponding vessels: inferior mesenteric, internal iliac and internal pudendal veins. The anorectal veins form a hemorrhoidal venous plexus which has a special clinical significance, as it can swell and present as different types of hemorrhoids.