the.com/femur
the longest, strongest bone you own, quietly bearing your whole dramatic existence.
strengthWithstands forces up to 1,800 pounds before snapping.
lengthRoughly a quarter of your total height.
blood factoryMarrow inside churns out millions of cells daily.
break warningA fracture can be life-threatening from blood loss.
age clueForensic scientists read it to estimate stature and sex.