Femur
The femur (/ˈfiːmər/, pl. femurs or femora /ˈfɛmərə/), or thigh bone, is the proximal bone of the hindlimb in tetrapod vertebrates (for example, the largest bone of the human thigh). The head of the femur articulates with the acetabulum in the pelvic bone forming the hip joint, while the distal part of the femur articulates with the tibia and kneecap, forming the knee joint. By most measures the two (left and right) femurs are the strongest bones of the body, and in humans,
Femur-1