Shinbone

The tibia, shinbone, or shankbone is the larger and stronger of the two bones in the leg below the knee in vertebrates and connects the knee with the ankle bones. It is the second largest bone in the human body.

In the male, its direction is vertical, and parallel with the bone of the opposite side. In the female, it has a slightly oblique direction downward and lateralward, to compensate for the greater obliqueness of the femur (thigh bone).