Ilium – arcuate line

Ilium - arcuate line

Anatomy

The pelvic brim (edge of pelvic inlet) is formed by the arcuate lines of the ilia, the pectineal lines of the pubis, the upper margin of the pubic symphysis and the sacral promontory. Above, abdominal cavity; below, pelvic cavity.

Vignette

Viewed from above, the pelvic brim is smooth, almost circular.

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