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hmmm..it's a little complecated
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what are the smallest blood vessels in the body?
a. capillaries.
which blood vessels carry blood away from the heart?
a. arteries.
which blood vessels carry deoxygenated blood?
a. veins.
which is the only vein that carries oxygenated blood?
a. pulmonary vein.
which type of walls are present in arteries?
a. thick and flexible walls.
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