The femur, also known as the thigh bone, is the only bone in the human thigh. It extends from the hip to the knee, making it the longest, strongest, and heaviest bone in the body

. Location and Structure:

• The upper (proximal) end of the femur connects to the hip joint, fitting into a socket in the pelvis called the acetabulum

• The lower (distal) end forms the top of the knee joint, where it meets the tibia (shinbone) and the patella (kneecap)

• The long middle part is called the femoral shaft, which supports body weight and forms the structure of the thigh

Summary:
The femur is located in the upper leg, running between the hip and the knee, and is surrounded by thigh muscles such as the quadriceps and hamstrings

. It plays a crucial role in supporting weight, enabling movement, and maintaining posture and balance

. In short, the femur is the single bone in the thigh, connecting the hip to the knee