Which bone is commonly referred to as the thigh bone?

The thigh bone is anatomically known as the femur. It is the longest and strongest bone in the human body, playing a crucial role in supporting the weight of the body during standing, walking, and running. The femur connects the hip joint at the top (proximal end) to the knee joint at the bottom (distal end), forming key joints essential for movement. The structure of the femur is adapted for its weight-bearing function, featuring a thick, compact outer layer and a wide head that fits securely into the hip socket to provide stability for the leg's movements. Its design also allows for a significant range of motion at the hip joint while maintaining strength and support needed for various physical activities.