astounding facts about the human body

A red blood cell can circumnavigate your body in under 20 seconds.

The average red blood cell lives for 120 days.

There are 2.5 trillion (give or take) of red blood cells in your body at any moment. To maintain this number, about two and a half million new ones need to be produced every second by your bone marrow.That s like a new population of the city of Toronto every second.

Considering all the tissues and cells in your body, 25 million new cells are being produced each second. That s a little less than the population of Canada every second !

Capillaries, on the other hand, are so small that it takes ten of them to equal the thickness of a human hair.

The aorta, the largest artery in the body, is almost the diameter of a garden hose.

Give a tennis ball a good, hard squee ze. You re using about the same amount of force your heart uses to pump blood out to the body.

?It s impossible to sneeze with your eyes open.

The life span of a taste bud is ten days.

If you could save all the times your eyes blink in one life time and use them all at once you would see blackness for 1.2 years!