Your body is creating and killing about 2.4 million red blood cells per second.
17
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
When you take a step, you are using up to 200 muscles.
886
Cracking your knuckles does not actually hurt your bones or cause arthritis. The sound you hear is just gas bubbles bursting.
18
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
If your DNA was stretched out it would reach to the moon 6,000 times.
256
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
Our Right Lungs takes more air than our left lung.
194