Name the Longest Bone in the Human Body

By BYJU'S Exam Prep

Updated on: November 9th, 2023

The Longest Bone in the Human Body is the Femur. The word “femur” comes from the Latin word “thigh”. Hence, it is also known as the thighbone, the hind leg, and the upper bone of the leg. Its head shapes a ball-and-socket joint with the hip. It is the only bone in the upper leg. By some measures, the femur is also the strongest bone in the human body. It is used in many medical procedures, such as hip replacements, bone grafts, and the treatment of bone cancer.

Longest Bone in the Human Body

The femur is the longest bone in our body. The structure of the Femur can be classified into three parts, namely the upper part, its body, and the lower part. Its head comprises two-thirds of a sphere.

The femur is the longest bone in the human body. It is the toughest bone to heal. When this bone breaks, it takes a longer time to cure. Its body is large, almost cylindrical, convex in front, and concave behind. The lowest part of the femur is the thickest. It comprises two oblong eminences known as the condyles.

Read: Which is the Smallest Bone in the Human Body?

Facts on the Longest Human Bone

  • The average length of the femur in an adult male is about 19 inches (48 cm) and in an adult female is about 17 inches (43 cm).
  • It has a small groove that is connected through a round ligament.
  • The femur contains bone marrow, which is responsible for producing red blood cells, white blood cells, and platelets.
  • By simply examining his or her thigh, one can determine that the femur is the longest bone.
  • The longest bone in the human body extends from the hip down to the knee.
  • The femur continues to grow and develop until a person reaches their mid-20s.


Name the Longest Bone in the Human Body

Femur is the Longest Bone in the Human Body and also the thickest bone. According to some criteria, it may even be the strongest bone in our body. The head of the femur articulates with the acetabulum to form the hip joint and with the tibia (shinbone) and patella (kneecap) to form the knee joint.

The femur extends from the hip to the knee and is often considered the hardest bone to heal in the body. It contains the bone marrow, which is an essential element responsible for producing RBCs, WBCs, and platelets.

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