Human Body Facts for Kids
Surprising facts about your body
The inside of your small intestine is covered in millions of tiny finger-like projections called villi. If flattened out, the total surface area would be about the size of a tennis court.
Newborn babies cry, but they cannot produce real tears until they are about two to four weeks old because their tear glands are not yet fully developed.
The brain itself has no pain receptors, which is why brain surgeons can operate on a patient who is awake. The surrounding tissues, however, can feel pain.
Your body produces approximately 25 million new cells every second. That means in the time it takes to read this sentence, your body has made hundreds of millions of new cells.
After losing a limb, many people experience 'phantom limb' sensations — their brain continues to send and receive signals as if the missing limb were still there.
The human body emits a faint glow of visible light, about 1,000 times weaker than what our eyes can detect. The brightest glow comes from your cheeks, forehead, and neck.
Eyebrows are shaped to divert sweat and rain away from your eyes, acting like tiny gutters on your face.
Humans and giraffes both have exactly seven vertebrae in their necks. A giraffe's individual vertebrae are just much, much larger.
Your nose does three jobs at once every time you breathe in: it filters out dust and germs, warms the air to body temperature, and adds moisture before it reaches your lungs.
Your fingerprints form while you are still in the womb, between weeks 10 and 16 of development. Even identical twins have different fingerprints.