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What 4 things help to keep blood flowing through the veins in one direction?
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What 4 things help to keep blood
flowing through the veins in one
direction?

User Sebastian Serrano
by
7.4k points

1 Answer

8 votes

Answer:

Valves in the veins keep blood flowing in the correct direction.

User Wojciech Jakubas
by
8.3k points
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