Is the hardest bone in the human body a tooth or a skull?

The hardest bone in the human body is the kneecap. Commonly known as kneecap, it is the seed bone formed on the tendon of quadriceps femoris. It is also the largest sesamoid bone in the whole body. It is flat and creamy, located under the skin and easy to feel.

It can move up, down, left and right to protect the knee joint. The back of the patella is smoothly covered with cartilage, which is in contact with the surfaces of femur and patella. The front is rough, and the quadriceps tendon passes through.

Extended data:

Patella functional structure:

1. The main function of patella is to guide and strengthen quadriceps femoris; Helps stabilize and protect the knee and acts as a pulley when the knee is straight.

2. Biological characteristics of patella: the intermediate structure of extensor patellae knee can transmit the tension generated by quadriceps femoris to patellar tendon; Patella increases the lever arm of knee flexion and extension point, and increases the torque of quadriceps femoris.

References:

Baidu encyclopedia-patella