How the Heart Works
Posted by on March 4, 2011 under General Health Info | 
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The heart is a muscle about the size of your fist. The heart works like a pump and beats about 100,000 times a day.
The heart has two sides, separated by an inner wall called the septum. The right side of the heart pumps blood to the lungs to pick up oxygen. Then, oxygen-rich blood returns from the lungs to the left side of the heart, and the left side pumps it to the body.
The heart has four chambers and four valves and is connected to various blood vessels. Read more of this article »