Human Body Facts for Kids
Surprising facts about your body
Your nose is lined with tiny hairs called cilia and a layer of mucus that trap dust, germs, and pollen before they reach your lungs.
You have around 2.5 million sweat glands across your body that help keep your temperature stable by releasing sweat when you get too hot.
Humans share about 50% of their DNA with bananas, showing how all living things on Earth are related at a molecular level.
You blink around 15 to 20 times per minute — that adds up to over ten million blinks per year — spreading moisture across your eyes.
The stapedius, a tiny muscle inside your ear, is the smallest muscle in the human body at just over one millimetre long.
Your outer layer of skin is completely replaced roughly every 27 days, meaning you grow around 1,000 new outer skins during your lifetime.
If you stretched out all the blood vessels in your body end to end, they would circle the Earth approximately two and a half times.
Scientists now believe the appendix may once have helped digest tough plant material, and it may still play a small role in supporting gut bacteria.
Your pupils dilate — grow larger — not only in dim light but also when you are excited, interested, or looking at someone you like.
You need saliva to taste food — without it, flavour molecules cannot dissolve and reach your taste buds properly.