Acetabulum
Acetabulum
The Acetabulum (pronounced: a-se-ta-bu-lum) is a concave surface of the pelvis. The word "acetabulum" is derived from the Latin word "acetum" meaning vinegar, and "abulum" denoting 'a small vessel for'. The acetabulum is a part of the pelvis that forms the socket in the ball-and-socket joint where the head of the femur (thigh bone) meets the pelvis.
Anatomy
The acetabulum is located at the junction of the ilium, ischium, and pubis, the three bones that make up the pelvis. It is cup-shaped and faces laterally, downwards and forwards. The acetabulum is divided into two parts: the lunate surface and the acetabular fossa. The lunate surface is a C-shaped area that articulates with the head of the femur. The acetabular fossa is a non-articular area in the floor of the acetabulum.
Function
The primary function of the acetabulum is to provide a socket-like structure for the hip joint. It allows for a wide range of motion in the hip, including flexion, extension, abduction, adduction, and rotation. The acetabulum, along with the head of the femur, bears the weight of the body in both standing and sitting positions.
Related Terms
See Also
External links
- Medical encyclopedia article on Acetabulum
- Wikipedia's article - Acetabulum
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