se7enW
Back to Which
🏆 which

Which Is the Longest Bone in the Human Body?

Human BodyAnatomy

Quick Answer

The femur (thighbone) is the longest and strongest bone, typically about one-quarter of a person total height.

The Full Story

The femur extends from the hip joint to the knee and is the longest, heaviest, and strongest bone in the human body. In an average adult, it measures about 48 cm (19 inches), roughly 26-27% of total body height. It supports the full weight of the body during standing and walking and can withstand compressive forces of up to 1,700 Newtons per cm². The femur is also the main bone used by forensic scientists to estimate the height of an individual from skeletal remains, as its length correlates closely with stature.

Key Facts

1.The femur is so strong that it typically takes a force of about 4,000 Newtons (roughly 400 kg) to fracture it.
2.The stapes (stirrup bone) in the middle ear is the smallest bone in the body, at about 3 mm long.
3.At birth, a baby has about 270 bones; many fuse together during growth, leaving 206 in a typical adult.

YouTube Angle

Suggested video title for this topic:

"The Femur — Why Your Thighbone Is an Engineering Marvel"

Was this answer helpful?

Tap a reaction — it helps us pick what to cover next.