There are about 1,400 different species of bacteria in your belly button.
10
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The aorta, the largest artery in the body, is almost the diameter of a garden hose.
37
Quick naps not only improve your alertness, but they also help in decision making, creativity and sensory perception.
149
There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
Within three days of death, the enzymes that once digested your food begin to eat you.
22
It takes about 20 seconds for a red blood cell to circle the whole body.
102
A woman's sense of smell is most sensitive during ovulation.
34