Primary
The skin is the largest organ of the human body.
Did You Know? Human Body Facts for Students
Weird and wonderful facts about the human body, its organs and bones, for students.
12 facts3 stages
Tip for school assemblies: pick 5 to 7 facts from different subjects and start each one with "Did you know that...".
Facts for Primary students
Primary
The thigh bone (femur) is the longest bone in the human body.
Primary
No two people have the same fingerprints, not even identical twins.
Primary
People blink about 15 to 20 times a minute.
Facts for Middle school students
Middle school
The liver is the largest internal organ in the human body.
Middle school
The smallest bone in the human body is the stirrup (stapes) in the middle ear.
Middle school
Babies are born with about 300 bones; some fuse as they grow, leaving adults with 206.
Middle school
The human heart beats about 100,000 times a day.
Middle school
The cells lining the stomach are renewed every few days to protect it from strong stomach acid.
Facts for Secondary students
Secondary
The human brain contains about 86 billion nerve cells (neurons).
Secondary
The gluteus maximus in the hip is the largest muscle in the human body.
Secondary
Scientists estimate the human eye can tell apart around a million colours or more.