ag5reecelzadmadrian ag5reecelzadmadrian

27-02-2017
Health

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Blood pressure in veins is lower than in arteries, so a series of ________ are necessary to prevent backflow of blood.

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briannapham briannapham

28-02-2017

A series of ONE-WAY VALVES are necessary to prevent backflow of blood when blood pressure in veins is lower than in the arteries.

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