Weird quirks and all, the human body is a a bewildering machine. While you may think you know your body well, the truth is, there is a lot that goes on behind the scenes that might shock you. Learn more about it with 10 of these mind-blowing facts that are sure to get your heart pumping.
1. Sorry lefties.

Right-handed people live, on average, nine years longer than left-handed people.
2. You’re not the only one who’s flattered.

When you blush, your stomach also turns red.
3. The hardest worker of all.

The heart beats more than 3 billion times in the average human lifespan.
4. Well, that’s unsettling.

You can produce enough saliva to fill two bathtubs a year.
5. Our toenails need to pick up the pace.

Fingernails grow about four times faster than your toenails.
6. Time to brush extra hard.

There are about 40,000 bacteria in the human mouth.
7. Now that’s impressive.

Bones are about 5 times stronger than steel.
8. Go ahead, try it.

It is impossible to sneeze with your eyes open.
9. No wonder food tastes so good.

Each of us has around 2,000 taste buds.
10. That’s unfortunate.

People with blue eyes are more sensitive to pain than others.