Coxal bone

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The coxal bone is one of three bones, along with the coccyx and sacrum that forms the pelvis. This bone enables hip movement. The coxal bone has an unusual appearance, with a complex shape that is often compared to a helix formed by two wings. This bone has the distinction of being created from the fusion of several bones during puberty: the pubis, ischium, and ilium. It moves the pelvis with the help of the sacroiliac joint, symphysis pubis, and acetabulum.