The hip bone

Hip bone · os coxae

The large winged bone on each side of your pelvis, holding the socket for your thigh bone.

What it does

Each hip bone is three bones, the ilium, ischium and pubis, that fuse during your teenage years. Together with the sacrum they make the pelvis, a bowl that carries the upper body, protects the bladder and bowel, and holds the deep socket for the head of the femur.

Surprising fact

The bony points you sit on are part of the ischium, often called your "sit bones", and they carry most of your weight when you're seated.

Why it matters

The pelvis is often used to estimate sex in skeletons because a typical female pelvis is wider and rounder, an adaptation for childbirth. The hip socket's depth is why hips dislocate far less often than shoulders.

Nearby

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Sources

Drafted with AI help; awaiting a human fact-check against these sources.

Open in the 3D atlas · Suggest a correction · Not medical advice.

3D models: Z-Anatomy & BodyParts3D (CC BY-SA 4.0 / 2.1 JP). Card text CC BY 4.0.