pelvic girdle

• support the lower extremities.
• ilium: broad blade-shaped bone that forms the back and sides of the pubic bone.
• sacroiliac: slightly movable articulation between the sacrum and posterior portion of ilium.
• ischium: forms the lower posterior portion of the pubic bone.
• pubis: forms the anterior portion of the pubic bone.
• acetabulum: hip socket.