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Title: What prevents the backflow of blood in veins? Post by: snowhite on Nov 22, 2015 What prevents the backflow of blood in veins?
A) thick smooth muscle and elastic layers B) valves C) the narrowed lumen D) increased blood pressure Title: Re: What prevents the backflow of blood in veins? Post by: WideEyes on Dec 15, 2015 Content hidden
Title: Re: What prevents the backflow of blood in veins? Post by: snowhite on Dec 26, 2015 I really appreciate your help!
Title: Re: What prevents the backflow of blood in veins? Post by: WideEyes on Dec 28, 2015 Mark it solved when you get a chance :)
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