Iliac fossa

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Iliac fossa
Right hip bone. Internal surface. (Iliac fossa visible at upper left.)
Pelvic girdle illustration.svg
Pelvic girdle. (Region of iliac fossa visible at tip of arrow pointing from the word "Ilium".)
Latin fossa iliaca
TA A02.5.01.115
FMA 75316
Anatomical terms of bone

The iliac fossa is a large, smooth, concave surface on the internal surface of the ilium (part of the 3 fused bones making the hip bone). The fossa is bounded above by the iliac crest, and below by the arcuate line; in front and behind, by the anterior and posterior borders.

The fossa gives origin to the Iliacus muscle and is perforated at its inner part by a nutrient canal; below this there is a smooth, rounded border, the arcuate line, which runs anterior, inferior, and medial.

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