1. Your fingernails grow four times as fast as your toenails?

2. Eyelashes last about 150 days.

3. The heart circulates your blood through your body thousands times in each day.

4. You make about half a quart (500ml) of spit each day.

5. Your blood has the  same amount of salt in it as the ocean does.

6. Humans are the only animals that cry when upset.

7. Many more boys are color blind than girls are.

8. Children have more taste buds than adults.

9. Your lungs are the only organs in your body that can float.

10. Food spends up to 6 hours in the stomach being digested.

11. Your eyeballs are actually a part of your brain.

12. The largest muscle in your body is one you are sitting on!