Your body is creating and killing about 2.4 million red blood cells per second.
17
It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
The average person's skin weighs twice as much as their brain.
131
The human brain doesn't stop developing until about 25 years old.
102
Enamel is hardest substance in the human body.
61
The average sperm cell swims at 8 inches per hour.
76
One human hair can support 3 ounces.
191