One of the major joints in the body, the knee is required to support huge and repeated pressures over the course of a lifetime. The articular surfaces of the joint are covered with glassy-smooth articular cartilage, and the menisci act as shock absorbers with each step.
The patella is a large sesamoid bone which lies within the quadriceps tendon. It articulates with the condyles of the femur.
The anterior and posterior cruciate ligaments are located at the center of the joint and allow some rotatory motion. The lateral and medial collateral ligaments are attached on either side of the joint to maintain stability.