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In terms of uniqueness, it is the only artery in the body that carries Oxygen poor blood. All of the other arteries carry oxygen rich blood.
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The pulmonary artery is the source of blood from the heart to the lungs. It along with the umbilical cord are the only two units that carry blood that has been deoxygenated. The pulmonary
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What makes these blood vessels unusual is that the pulmonary artery carries deoxygenated blood (instead of oxygenated), and the pulmonary vein transports oxygenated blood, not oxygen-poor
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the pulmonary artery carries deoxigenated blood
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