Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The average sperm cell swims at 8 inches per hour.
76
If you hold farts in during the day, they'll just come out when you sleep.
16
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There's 100 trillion good bacteria living in your body.
17
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17