How is the hip joint structured?

The hip joint is made up of two bony sections:

  • femoral head: globular end of the femoral neck
  • acetabulum: cup-like cavity in the pelvis bone
Anatomy hip joint

When in a healthy condition, both joint surfaces are covered with a layer of joint cartilage that acts as a kind of shock absorber. It helps to distribute and reduces the forces which act upon the hip joint. This surface is lubricated by synovial fluid. The synovial fluid enables smooth movements of the bones and reduces friction. The fixed joint capsule forms an envelope around the hip joint.

Stability and movement thanks to ligaments and muscles

It is the bony structure which makes this joint so stable: The femoral head rests securely in the amply sized concave acetabulum. The hip joint is also reinforced by strong ligaments. The joint is surrounded by strong muscles which help protect it and allow a powerful movement of the legs.