It would take about 1,200,000 mosquitoes to fully drain the average human body of blood.
217
It takes about 20 seconds for a red blood cell to circle the whole body.
102
The adult human brain weighs about 3 pounds (1,300-1,400 g).
99
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Your thumb is about the same size as your nose.
124
When you take a step, you are using up to 200 muscles.
886
If your DNA was stretched out it would reach to the moon 6,000 times.
256