Valves regulate the flow of blood in a singular direction. Each chamber has a sort of one – way valve at its exit that prevents blood from flowing backwards. When each chamber contracts, the valve at its exit opens. When it is finished contracting, the valve closes so that blood does not flow backwards.
There are four valves in the heart as follows:
1. The tricuspid valve
2. The pulmonary valve
3. The mitral valve
4. The aortic valve
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http://www.wonderwhizkids.com/index.php/heart
There are four valves in the heart as follows:
1. The tricuspid valve
2. The pulmonary valve
3. The mitral valve
4. The aortic valve
read more.....
http://www.wonderwhizkids.com/index.php/heart
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