Where is the human femur located?

The femur is the bone of the upper leg, running from the hip joint to the knee joint. It is the longest and strongest bone in the human skeleton and plays a major role in supporting body weight and movement. The head of the femur fits into the pelvis at the hip, while its lower end forms part of the knee joint. Because it bears so much stress, the femur is a critical bone for walking, running, and balance.