Your humerus (and all your bones) are alive and keep renewing themselves bit by bit — over about 10 years, many of the bone parts get replaced so your bones stay healthy and strong!
Human Body - Facts for Kids
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Random Facts About Human Body For Kids
Your blood type is determined (decided) before you’re born and stays the same your whole life!
Basic Information
The pupil is not actually a structure itself but the black circular opening in the center of your eye that lets light enter.
Your blood can fight off most germs before they make you sick, like having millions of tiny soldiers protecting you!
Exercise helps your body make more mitochondria, which is why athletes have lots of energy for sports!