The knee joint is the largest, most complex joint in the human body. This strong, weight-bearing joint is where two of the longest bones in the body meet, the thigh bone (femur) and the shin bone (tibia). The kneecap (patella) and the fibula are the other, smaller bones that make up the knee joint.
The knee’s anatomy comprises of bones, ligaments, tendons, muscles and cartilage and each has its own job. Tendons connect the knee bones to the leg muscles that move the knee joint, ligaments join the knee bones to provide stability to the knee and cartilage acts as a shock absorber.
The main function and design of the knee joint is to support the full weight of the body, allowing us to go about our everyday activities, including walking, running, sitting and standing. Yet, despite being the largest and strongest joint in the body, the knee joint is also the joint most prone to injury and most commonly affected by osteoarthritis. Damage to any structure of the knee will have an impact on the normal movement of the leg.