The human heart creates enough pressure to squirt blood 30 ft.
37
Your thumb is about the same size as your nose.
124
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
About 400 different kinds of microbes live on and in the human body.
-3
Your heart pumps about 2,000 gallons of blood each day!
53
You're born with 300 bones, but when you get to be an adult, you only have 206!
17
It takes 17 muscles to smile, 43 to frown.
65
A fetus develops fingerprints at eighteen weeks!
32