iliac artery iliac artery in human anatomy, the iliac arteries are three arteries located in the region of the ilium in the pelvis: common iliac artery – forms at terminus of the aorta external iliac artery – forms where the common iliac artery bifurcates, continues as the femoral artery at the inguinal ligament internal iliac artery – forms where the common iliac artery bifurcates, supplies the perineum and sexual organs. not to be confused with ileal arteries.