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Veins contain a network of valves to insure a one-way flow of blood but arteries do not. This is because veins must counteract the force of _______ on blood flow.
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Veins contain a network of valves to insure a one-way flow of blood but arteries do not. This is because veins must counteract the force of _______ on blood flow.

User Israel Altar
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2 Answers

5 votes
Hello!

answer is "force"

have a nice day!
User JayD
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2 votes
they must counteract the force of blood pressure
User Marcelog
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