If you hold farts in during the day, they'll just come out when you sleep.
16
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
The brain receives 20% of the body’s oxygen and 25% of total body glucose utilization, despite it accounting for only 2% of a person’s weight (about 1.4 kilograms).
8
There are about 1,400 different species of bacteria in your belly button.
10
The average sperm cell swims at 8 inches per hour.
76
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
22
The human body contains over a billion miles of DNA.
147