The uterine artery usually arises from the anterior division of the internal iliac artery. The external iliac artery arises from the bifurcation of the common iliac artery. It arises from the anterior division of internal iliac artery. The iliacus originates on the iliac fossa of the ilium. The iliacus originates in the iliac fossa of the pelvis. The following are the branches of internal iliac artery. The iliocostalis originates from the sacrum, erector spinae aponeurosis, and iliac crest. In the articulated pelvis the alae are continuous with the iliac fossa. Symptoms include localized findings in the right iliac fossa. They accompany the branches of the internal iliac artery. The exact arrangement of branches of the internal iliac artery is variable. Tumors on the superolateral bladder wall spread to external iliac lymph nodes. The pelvis and legs get their blood from the common iliac arteries. The outer lip bulges laterally into the iliac tubercle. The iliacus is a flat, triangular muscle which fills the iliac fossa.