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Zanzabum
3 years ago
12

8. Valves prevent blood from flowing backwards. Valves are located in the

Biology
2 answers:
Verdich [7]3 years ago
3 0

Answer:

Heart and artries

Explanation:

PLEASE MARK AS BRAINLIEST

slamgirl [31]3 years ago
3 0
The veins help not let the blood go backwards
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3 years ago
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