part of part of tributary of tributary of Homo sapiens system internal iliac vein obturator vein http://upload.wikimedia.org/wikipedia/commons/b/bd/Gray585.png NCIT:C53056 UMLS:C0226776 MA:0002183 SCTID:20146009 Wikipedia:Obturator_veins EMAPA:37677 The obturator vein begins in the upper portion of the adductor region of the thigh and enters the pelvis through the upper part of the obturator foramen, in the obturator canal. It runs backward and upward on the lateral wall of the pelvis below the obturator artery, and then passes between the ureter and the hypogastric artery, to end in the hypogastric vein. It has an anterior and posterior branch (similar to obturator artery). [WP,unvetted]. FMA:18914 UBERON:0001321 vein