Human Body Facts for Kids
Surprising facts about your body
Your skeleton completely renews itself roughly every 10 years through a constant cycle of old bone being broken down and new bone being built.
During the early weeks of development, every human embryo has a small tail. It usually disappears by about the eighth week, leaving behind the coccyx or tailbone.
The cornea is the only part of the human body that receives oxygen directly from the air rather than through the blood supply.
You blink around 15 to 20 times every minute. Over a lifetime, that adds up to roughly 400 million blinks, and each one spreads a thin film of tears to keep your eyes moisturised.
The human body hosts roughly 38 trillion microorganisms — bacteria, fungi, and viruses — which slightly outnumber the approximately 30 trillion human cells.
Your pinky finger is responsible for about 50 per cent of your hand's overall gripping strength, working together with your ring finger.
Goosebumps are a leftover reflex from when our ancestors had much more body hair. The raised hairs would have trapped warm air or made them look bigger to predators.
The human brain is about 60 per cent fat, making it the fattiest organ in the body. These fats are essential for brain cell structure and nerve signalling.
Your mouth produces about one litre of saliva every day. Over a lifetime, that is enough to fill two swimming pools.
A red blood cell can complete a full circuit of the entire body in just 20 seconds, travelling through roughly 96,000 kilometres of blood vessels.