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
Your thumb is about the same size as your nose.
124
When you take a step, you are using up to 200 muscles.
886
Enamel is hardest substance in the human body.
61
Your heart will pump about 212 million liters in its lifetime.
26
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
Chewing gum boosts your brain power.
285