Arteries: Always carry blood away from the heart, Carry oxygenated blood, except for the pulmonary artery, Carry blood under high pressure, Have thick muscular and elastic walls to pump and accommodate blood, The channel in the blood vessel that carries blood - the lumen - is narrow, Veins: Always carry blood to the heart, Always carry deoxygenated blood, except for the pulmonary vein, Carry blood under low or negative pressure, Have thin walls, Have a wide lumen,

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