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Help prevent backflow of blood. OBlood vessels O Lungs O Blood pressure O None of these answers are correct. O Valves
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5 votes
Help prevent backflow of blood.

OBlood vessels
O Lungs
O Blood pressure
O None of these answers are correct.
O Valves

User Christyn
by
7.0k points

1 Answer

6 votes
the answer is valves :)
User Guilherme Oderdenge
by
7.5k points
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