The body that forms the posterior portion of the acetabulum is known as the?

• A. Sacrum
• B. Ischium
• C. Ilium
• D. Pubis

Answer: (B)

The body that forms the posterior portion of the acetabulum is indeed the ischium. The acetabulum is the cup-shaped socket in the pelvis that receives the head of the femur to form the hip joint. It is composed of three pelvic bones: the ilium, ischium, and pubis.

The ischium primarily contributes to the posterior aspect of the acetabulum, providing structural support and stability to the hip joint. It consists of a body and a ramus; the body is the part that contributes to the acetabulum. Understanding the anatomy of the pelvis is crucial in radiography, as this knowledge aids in identifying and diagnosing potential injuries or conditions related to the hip joint.