Bony pelvis (superior view) (English)

The bony pelvis is divided into the greater and lesser pelvis by the pelvic inlet (superior pelvic aperture). Posteriorly, the pelvic inlet is bounded by the sacral promontory and alae of the sacrum. The anterolateral borders are defined by a right and left linea terminalis, which are formed by the arcuate line of the ilium and pectin pubis/pubic crest of the pubis. The greater (a.k.a false) pelvis is found superior to the pelvic inlet and contains the inferior parts of the abdominal organs. The lesser (a.k.a. true) pelvis is located between the pelvic inlet and pelvic outlet, and it includes the intrapelvic urinary organs, internal reproductive organs and the perineum.