Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The femur is the longest and strongest bone in the human body, located in the thigh. It extends from the hip joint to the knee joint and supports much of the body's weight.
5 Must Know Facts For Your Next Test
The femur articulates with the pelvis at the acetabulum to form the hip joint.
The distal end of the femur connects with the tibia and patella at the knee joint.
It contains both compact bone for strength and spongy bone for shock absorption.
Muscles such as the quadriceps and hamstrings attach to the femur, facilitating movement.
Femoral fractures are serious injuries that can affect mobility and require significant medical intervention.
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Related terms
Tibia: The larger of the two bones in the lower leg, connecting with both the knee and ankle joints.
Acetabulum: The socket in the pelvis that articulates with the head of the femur to form the hip joint.
Patella: A small bone located in front of the knee joint, also known as a kneecap, which protects and provides leverage.