If you were to roll a lung from a human body and out flat it would be the size of a tennis court.
36
Like fingerprints, everyone's tongue print is different!
71
Redheads require up to 20% more anesthesia to be knocked out.
112
The male fetus is capable of attaining an erection during the last trimester.
75
According to a 1950s survey, 75% of men ejaculate within two minutes of penetration.
109
Every year your body replaces 98% of your atoms.
119
All humans have the ability to see ultraviolet light, but it is passively filtered out by the eye's lens. People who undergo surgery to remove the lens can detect ultraviolet light.
21
The largest cell in the human body is the female egg and the smallest is the male sperm.
682