what is the name of the kneecap bone?
The fourth bone of the knee is the patella. Commonly referred to as the kneecap, this nearly heart-shaped bone at the center of the knee helps extend the knee and protect the joint from impact. A tendon at the top of the patella and a ligament at the bottom hold the bone in place. As the knee bends, the patella slides along a groove in the femur.