Understanding Heart Valves - Fairview Health Services
 
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Understanding Heart Valves

Closed valve

Open valve

The heart contains four valves. The valves open and close to keep blood moving in the right direction through the heart. As the heart beats, blood moves through it. With each squeeze, the valves open and close to keep blood moving forward. In this way, valves keep blood moving as efficiently as possible through the heart.

Image of how heart works

 

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