If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
During a typical human life span, the human heart will beat approximately 2.5 billion times.
21
Surgeons who listen to music during operations perform better than those who don't .
87
It is possible to go blind from smoking too heavily.
50
During menstruation, the sensitivity of a woman's middle finger is reduced.
47
It takes 17 muscles to smile, 43 to frown.
65
If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36