If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
Cigarette smoke contains 4,800 chemicals, 69 of which cause cancer.
145
In older people, memory is best early in the morning and then declines during the late afternoon.
33
The average human body contains enough fat to make seven bars of soap.
45
A toothbrush within 6 feet of a toilet can get airborne bacteria from flushing.
15
When you get goosebumps and your hair stands, the hair helps to trap air, making you feel warmer by keeping in your body heat.
46
Human teeth are almost as hard as rocks!
47
