31. The left side is most afflicted because the left iliac vein is crossed by the right iliac artery. 32. The ureters cross the pelvic brim near the bifurcation of the iliac arteries ( which they run over ). 33. The middle rectal artery usually arises with the inferior vesical artery, a branch of the internal iliac artery. 34. They define the Eryopoidea as all Euskelia in which the choana are relatively rounded and the iliac blade vertical. 35. Behind the iliac fossa is a rough surface, divided into two portions, an anterior and a posterior. 36. The abdominal aneurysm extends down to the common iliac arteries in about 25 %-30 % of patients. 37. Bone marrow aspiration and trephine biopsy are usually performed on the back of the hipbone, or posterior iliac crest. 38. They anastomose with the lower intercostal, the iliolumbar, the deep iliac circumflex, and the inferior epigastric arteries. 39. It is one of two such spines on the posterior surface, the other being the posterior superior iliac spine. 40. A " longline corset " either overbust or underbust extends past the iliac crest, or the hip bone.
