Why are the arteries and veins connected by the capillaries? If veins carry de-oxygenated blood and arteries carry oxygenated blood, why are they connected?
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You need a return path to the heart/lung system: this is a closed loop .
Explanation:
Veins and arteries are just nomenclature:one carries oxygenated blood the other de-oxygenated to various end points of the body.
You need a return path to the heart/lung system: this is a closed loop .
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