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. .