WHAT MAKES BONES GROW As long as growth plates (at the end of long bones in your arms and legs) stay open, you grow. The plates close in the late teens for boys and within 2 years of starting periods for girls.
LONGEST The femur, or thighbone, is the longest and strongest bone of the human skeleton. SMALLEST The stapes, in the middle ear, is the smallest and lightest bone of the human skeleton.