The knee is the largest joint in the body. It is a specialised hinge joint made up of four main things: bone, cartilage, ligaments and tendons. The main movement that occurs in the knee joint is flexion and extension. It does however allow for a small amount of rotation and gliding on the surfaces.
Synovium – Forms the lining of the joint and produces the fluid which lubricates the joint.A thin fluid membrane called synovium exists between the femur, tibia and behind the patella to lubricate the joint and add additional cushioning to support smooth movement
Blood vessels and Nerves – Major blood vessels and nerves pass through the knee joint to aid supply of the lower limbs with blood and sensory and motor function.