Thursday, September 30, 2010

First Aid 4

In the article Your Heart's Electrical System states that,
"The heart’s electrical system is made up of three main parts: The sinoatrial node, located in the right atrium of your heart, the atrioventricular node, located on the interatrial septum close to the tricuspid valve, and the His-Purkinje system, located along the walls of your heart’s ventricles. Each and every beat of your heart is set in motion by an electrical signal from within your heart muscle. The signal spreads across the cells of your ventricle walls, and both ventricles contract.  As the signal passes, the walls of the ventricles relax and await the next signal. This process continues repeatedly as the atria refill with blood and other electrical signals come from the SA node."

No comments:

Post a Comment