Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
There are about 1,400 different species of bacteria in your belly button.
10
The human body contains over a billion miles of DNA.
147
For most people, no matter how hard you pinch the skin on your elbow with your fingers it doesn't hurt.
515
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
Within three days of death, the enzymes that once digested your food begin to eat you.
22
The average sperm cell swims at 8 inches per hour.
76