Credits


Wednesday, February 11, 2009

Human Heart

Did you know that the human heart does not really look like the shape of the Valentines heart? The human heart is about the size of a fist. The heart is a muscle with lots of blood supplied on it thus it looks like a red meat. Most people have heard that the heart is on the left side of the chest. In reality, the heart is in the middle of the chest, tucked snugly between the two lungs. What does the heart actually do? The heart is a pump that pushes blood throughout the body. The heart moves blood by expanding and contracting (getting bigger and smaller).

"Each living part of the body needs blood to live, and that's why it's important for the blood to go to different parts of the body.

When you're exercising, it takes your blood about ten seconds to get from your heart to your big toe and back. In fact, a kid's heart has to push blood through about 60,000 miles (96,560 kilometers) of blood vessels—that's long enough to circle the Earth two and a half times!

All that pumping takes a lot of effort. To push blood, an average heart beats a hundred thousand times a day. That means that in a lifetime, the average human heart will beat more than two and a half billion times.


A friendly reminder also to everyone that February also is " American Heart Month".

I have read this article from National Geographic.

Geraldine

2 comments:

Sophia Chu said...

great info... :)

texaswithlove1982 said...

Thanks for the comment!