Human Body - Facts for Kids

The femur (thighbone) is your longest and strongest bone, measuring about one-quarter of your height!

The bone marrow (soft inside part) inside your bones comes in two colors — red marrow makes blood cells, and yellow marrow stores fat!

Blood types were discovered in 1901 by Karl Landsteiner, saving many lives!

The wrist bone (called the distal radius) is the most commonly broken bone — especially when people try to catch themselves during a fall!

The protective lining of your esophagus can get more delicate as you get older — so it needs extra care, like fragile armor!