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Arteries are normally depicted as red while veins are colored blue due to the oxygenation of the blood being transported by each type of vessel. the exceptions to this rule are the ________ arteries and veins.

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The exceptions to this rule are the pulmonary arteries and veins.  

The pulmonary artery is the one that carries deoxygenated blood from the right side of the heart (ventricle) to the lungs. On the other side, pulmonary veins transfer oxygenated blood from the lungs to the heart (left atrium).

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