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Title: How do veins prevent the backflow of blood? Post by: Jermain_ on Mar 18, 2014 How do veins prevent the backflow of blood? A) gravity B) pressure C) valves D) bulk flow Title: Re: How do veins prevent the backflow of blood? Post by: padre on Mar 18, 2014 Content hidden
Title: Re: How do veins prevent the backflow of blood? Post by: Jermain_ on Mar 18, 2014 Thank you very much.
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