If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
If your stomach didn't produce a new layer of mucous every two weeks, it would digest itself.
33
If you unfolded your brain, it would cover an ironing board.
42
In Japan, condoms are commonly sold 'door to door'!
54
A hard working adult sweats up to 4 gallons per day. Most of the sweat evaporates before a person realizes it's there, though!
25
Like fingerprints, everyone's tongue print is different!
71
Dieters who sleep more take off more fat that those who sleep less.
159