The average sperm cell swims at 8 inches per hour.
76
Enamel is hardest substance in the human body.
61
The largest cell in the human body is the female egg and the smallest is the male sperm.
682
The human body contains over a billion miles of DNA.
147
The human brain is very soft, having a consistency similar to soft gelatin or firm tofu.
13
If every muscle in your body could pull in one direction, you could lift nearly 25 tons.
22
After age 30, the brain begins to lose about 50,000 neurons per day - shrinking the brain .25% each year.
55