The arcuate line of the ilium is a smooth rounded border on the internal surface of the ilium. It is immediately inferior to the iliac fossa and Iliacus muscle.
Additional images
File:Arcuate line of ilium 02 animation.gif|Position of arcuate line of ilium. Shown in red. File:Arcuate line of ilium 03 animation.gif|Close up File:Skeletal pelvis-pubis.svg|Pelvis with the iliopectineal line indicated in red ==References==