Human Body Facts for Kids
Surprising facts about your body
Your pupils get bigger when you see something interesting or when it's dark outside.
About 60% of your body is made up of water.
No two people have the same pattern of bumps on their tongue — your tongue print is as unique as your fingerprint.
Your brain is often more active while you are asleep than when you are awake, especially during the dream phase known as REM sleep.
Your entire skeleton is completely replaced with new bone roughly every 10 years. Old bone is constantly being broken down and rebuilt by specialised cells.
The average human tongue has about 10,000 taste buds, each one containing 50 to 100 taste receptor cells.
Over a lifetime, the average person produces enough saliva to fill two swimming pools — roughly 35,000 litres.
The pineal gland, a tiny organ deep inside your brain the size of a grain of rice, produces melatonin, the hormone that tells your body when to sleep.
The human body is made up of roughly 37 trillion cells, each one carrying out specific jobs to keep you alive.
Your inner ear contains fluid-filled tubes that detect movement and help your brain keep your body balanced.