Final answer:
The biggest bone in the human body is the femur, or thighbone, located in the leg. It is part of the appendicular skeleton and forms the hip and knee joints, the latter being the largest joint in the body.
Step-by-step explanation:
The biggest bone in the human body is indeed located in your leg. This bone is known as the femur, or thighbone, which is the longest and strongest bone. It is part of the appendicular skeleton and is crucial for supporting the weight of the body and facilitating movement. The femur forms two important joints: the hip joint with the pelvis and the knee joint, which is the largest joint in the human body. Additionally, the tibia and fibula make up the bones of the lower leg, with the tibia being the second longest bone after the femur. The tibia is also the main weight-bearing bone of the lower leg.