What is the name of the bone that forms the kneecap?

The bone that forms the kneecap is called the patella. This small, flat bone plays a crucial role in the knee joint by protecting it and aiding in the efficient movement of the leg. The patella acts as a fulcrum for the quadriceps muscles, enhancing the leverage and strength of the knee during activities such as standing, walking, and running. Its unique structure allows it to glide smoothly within the tendon of the quadriceps, providing support and stability to the knee.

In terms of anatomy, the patella is classified as a sesamoid bone, which means it is embedded within a tendon and can vary in size and shape among individuals. This feature distinguishes it from the other options listed, which are all long bones found in the leg: the fibula and tibia are located in the lower leg, while the femur is the thigh bone. Understanding the role and location of the patella is important for those studying anatomy, as it highlights how bones work together to facilitate movement and protect joints.