It takes about 20 seconds for a red blood cell to circle the whole body.
102
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
We forget why we have entered a room because passing through doors creates an ‘event boundary’ causing the brain to file away what we were just thinking about.
26
On average a woman has 4 sexual partners in her lifetime.
-143
It takes approximately 12 hours for food to entirely digest.
93
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
The average sperm cell swims at 8 inches per hour.
4
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99