Which bone is the outer leg bone?

Which bone is the outer leg bone?

• A. Tibia
• B. Femur
• C. Mandible
• D. Fibula

Answer: (D)

The fibula is the outer leg bone. The leg has two parallel bones from knee to ankle: the larger tibia, which bears most of the body's weight and sits on the inside, and the thinner fibula on the outside. The mandible is the jawbone, and the femur is the thigh bone, so they aren’t the bones on the outer part of the leg. The fibula mainly provides lateral stability and muscle attachment, not weight-bearing, which is why it’s identified as the outer leg bone.

The fibula is the outer leg bone. The leg has two parallel bones from knee to ankle: the larger tibia, which bears most of the body's weight and sits on the inside, and the thinner fibula on the outside. The mandible is the jawbone, and the femur is the thigh bone, so they aren’t the bones on the outer part of the leg. The fibula mainly provides lateral stability and muscle attachment, not weight-bearing, which is why it’s identified as the outer leg bone.