The ilium is a bone of the pelvic girdle with four bony projections, each serving as attachment points for muscles and ligaments: * Anterior superior<unk>  * Anterior inferior<unk>  * Posterior superior<unk>  * Posterior inferior<unk>
Iliac spine
Neutral spine
Scalpel
Costovertebral angle
Cervical rib
Radium jaw
Boracic lint
Triangles of the neck