tahliamendoza
tahliamendoza tahliamendoza
  • 19-05-2020
  • Biology
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What is the function of heart valves?
They return blood to the heart.
They force blood to flow out of the heart.
They regulate the heart rhythm.
They prevent blood from flowing backwards.

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homeworkhelp176
homeworkhelp176 homeworkhelp176
  • 19-05-2020
The valves prevent the backward flow of blood.
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