Difference between arteries and veins?

1.	Difference between arteries and veins?
Answer» Arteries carry oxygenated blood Veins carry deoxygenated blood Artery are thick walled do not have valve on the other hand veins are thin walled and have valves Artery carry oxygenated blood from heart to body parts except pulmonary artery. Where as veins carry deoxygenated blood back to heart for oxygenation. Except pulmonary vein

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