inferior rectal veins inferior rectal veins the lower part of the external hemorrhoidal plexus is drained by the inferior rectal veins (or inferior hemorrhoidal veins) into the internal pudendal vein. inferior rectal veinsscheme of the anastomosis of the veins of the rectumdetailsdrains fromrectumdrains tointernal pudendal veinarteryinferior rectal arteryidentifierslatinvenae rectales inferioresta98a12.3.10.021ta25033fma70913anatomical terminology pathologies involving the inferior rectal veins may cause lower gi bleeding. depending on the degree of inflammation, they are given a grade level ranging from 1 through 4. additional images the perineum. the integument and superficial layer of superficial fascia reflected.