Human Body Facts for Kids

Your brain is about 73% water — even mild dehydration can affect how well you think.

The funny bone isn't a bone at all — it's a nerve called the ulnar nerve that runs along your elbow.

You can't tickle yourself because your brain predicts the sensation and cancels it out.

Humans can actually survive without a stomach — food can go directly from the esophagus to the small intestine.

Tears of sadness, joy, and from onions all have different chemical compositions.

The average person walks about 100,000 miles in their lifetime — that's over 4 trips around the Earth.

The faint glow your body produces is brightest in the late afternoon around your cheeks.

It takes about 200 muscles to take a single step.

Your nose warms, moistens, and filters the air you breathe before it reaches your lungs.

Human cells have 46 chromosomes, arranged in 23 pairs, that carry all your genetic instructions.