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Reference Terms
from Wikipedia, the free encyclopedia

Heart valve

In anatomy, the heart valves are valves in the heart that maintain the unidirectional flow of blood by opening and closing depending on the difference in pressure on each side.

Note:   The above text is excerpted from the Wikipedia article "Heart valve", which has been released under the GNU Free Documentation License.
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Health & Medicine News
October 23, 2016

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updated 12:56 pm ET