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What structure prevents blood from flowing backward in the heart? atrium ventricle valve vessel
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What structure prevents blood from flowing backward in the heart?

atrium

ventricle

valve

vessel

User Noha Kareem
by
7.4k points

2 Answers

4 votes

Answer:

valve

Step-by-step explanation:

edge

User Erlkoenig
by
7.2k points
6 votes

Answer:

its valve

Step-by-step explanation:

User Taras
by
7.9k points
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