What is the knee joint?

What is the knee joint?

Three bones come together to form your knee joint. They include the:

• Thighbone (femur).
• Shinbone (tibia).
• Kneecap (patella).

A smooth substance called cartilage covers the ends of each bone. It’s a cushion between the bones that keeps them from rubbing together. The synovial membrane, a type of tissue that surrounds the joint, lubricates the cartilage.