It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
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
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
One human hair can support 3 ounces.
191
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
The human body contains over a billion miles of DNA.
147