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, which vastly increase the surface area available for absorbing nutrients.
Exercise triggers the release of chemicals called endorphins in your brain, which reduce pain and boost feelings of happiness — sometimes called the 'runner's high'.
Capillaries — the smallest blood vessels in the body — are so tiny that red blood cells have to pass through them in single file.
Your wrist contains eight small bones called carpals arranged in two rows, allowing a wide range of flexible movement.
You are actually slightly taller first thing in the morning than at bedtime — the cartilage between your spinal discs compresses slightly during the day under gravity.
Red bone marrow, found inside large bones such as your pelvis and sternum, is the factory where new blood cells are produced.
The human body has around 600 named skeletal muscles, ranging from the tiny stapedius in your ear to the large gluteus maximus in your bottom.
Your nasal cavity warms, humidifies, and filters air before it reaches your lungs, helping to protect the delicate tissues inside them.
Humans are the only animals known to shed emotional tears — while other animals produce tears to protect their eyes, only humans cry in response to emotions.
Telomeres are protective caps at the ends of chromosomes that shorten each time a cell divides — their gradual reduction is linked to the ageing process.