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What happens if there are no valves in v...

What happens if there are no valves in veins?

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1) If the valves are absent in veins blood will not flow in unidirection and flows backward too.
2) Blood will not supplied to heart properly.
3) Bulging of veins may takes place.
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VGS PUBLICATION-BRILLIANT-TRANSPORTATION - THE CIRCULATORY SYSTEM-2 MARK QUESTIONS
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