Arcuate line of the ilium

Definition

The arcuate line of the ilium is a smooth, curved ridge found on the internal surface of the ilium in the pelvic bone, marking the boundary between the true pelvis above and the false pelvis below. It serves as an important landmark for anatomical orientation and surgical procedures.

Related terms

Pelvic Girdle: The ring-like bony structure at the base of the spine that supports the legs, consisting of two hip bones (including ilia), sacrum, and coccyx.

Ilium:

The largest bone in the hip, forming the upper part of each half of the pelvis and providing support for body weight during standing or walking.

True Pelvis:

The bony region located below the arcuate line, enclosing the pelvic cavity where reproductive organs, bladder, and rectum are situated