What is the largest bone in the human body?

The femur is recognized as the largest bone in the human body due to its significant length and mass. It is located in the thigh and extends from the hip to the knee. As the primary bone of the upper leg, its structure is designed to support the weight of the body, withstand forces during activities such as walking, running, and jumping, and provide attachment points for various muscles that facilitate movement.

In comparison to the other options, while the tibia is a large bone in the lower leg, it does not surpass the femur in terms of size. The humerus, located in the upper arm, is important for arm movement but is shorter than the femur. The pelvis supports the trunk and plays a key role in the skeletal structure, but it is a composite structure made up of several bones and does not represent a single large bone when compared directly to the femur. Therefore, the femur's dimensions and role in mobility confirm its status as the largest bone in the human body.