Human Body Facts for Kids

A cough can blast air out of your lungs at up to 60 miles per hour.

It takes about 17 muscles to smile and 43 muscles to frown.

Humans are the only animals known to cry emotional tears.

Your kidneys filter about 50 gallons of blood every single day.

Your brain contains about 86 billion nerve cells called neurons.

When you break a bone, your body can repair it all by itself — the healed bone is often stronger than before.

Your middle fingernail grows the fastest, and your thumbnail grows the slowest.

If you laid all your blood vessels end to end, they would wrap around the Earth about 2.5 times.

Newborn babies cannot taste salt until they are about 4 months old.

Your body completely replaces your skeleton roughly every 10 years.