Enamel is hardest substance in the human body.
61
Your heart will pump about 212 million liters in its lifetime.
26
Chewing gum boosts your brain power.
285
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The average person's skin weighs twice as much as their brain.
131
Your body is creating and killing about 2.4 million red blood cells per second.
17
The human brain doesn't stop developing until about 25 years old.
102
When you take a step, you are using up to 200 muscles.
886