Human Body Facts for Kids
Surprising facts about your body
Newborn babies have far more cartilage than bone — many bones, such as those in the wrists, only harden fully by the time a child is around eight years old.
The cornea — the clear surface of your eye — is the only part of the human body that receives oxygen directly from the air rather than from blood.
Your stomach can stretch to hold about one to two litres of food and liquid, though its empty size is roughly the size of your fist.
Your blood type — A, B, AB, or O — is inherited from your parents, and the rarest blood type is AB negative.
Scientists estimate the human nose can detect up to one trillion different smells using about 400 types of smell receptors.
A baby's heart begins beating when the embryo is just around six weeks old — often before the mother even knows she is pregnant.
Your ribcage is made up of 24 ribs arranged in 12 pairs, forming a protective cage around your heart and lungs.
Your body is home to trillions of bacteria — mostly harmless or beneficial — and there are roughly as many bacterial cells as human cells in your body.
Most vivid dreaming happens during REM (Rapid Eye Movement) sleep, when your eyes move quickly beneath your eyelids and your brain is highly active.
The thyroid gland in your neck produces hormones that control your metabolism — regulating how fast your body uses energy.