In mammals, veins differs from arteries in having
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veins carry deoxygenated blood (except the pulmonary vein)
arteries carry oxygenated blood (except the pulmonary artery)
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Veins have valves to prevent back flow of deoxygenated blood
Arteries have thick wall for prevention of rupture of artery walls due to heigh blood pressure
(Arteries lack valves because there is no back flow of blood )
Arteries have thick wall for prevention of rupture of artery walls due to heigh blood pressure
(Arteries lack valves because there is no back flow of blood )
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