The largest cell in the human body is the female egg and the smallest is the male sperm.
682
A person can live without food for about a month, but only about a week without water.
156
It takes about 20 seconds for a red blood cell to circle the whole body.
102
Pet dogs and elephants are the only animals that seem to instinctively understand human gesture.
14
On average, there's 100 billion neurons in the human brain.
83
A third of the human population sneezes when they look at the Sun. Light can signal the ocular nerve near the sinuses and triggers a sneeze.
18
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197