In pulmonary circulation, oxygen-rich blood is carried by pulmonary veins, while in systemic circulation, oxygen-rich blood is carried by systemic arteries.
In pulmonary circulation, the vessels that carry oxygen-rich blood are the pulmonary veins, which return freshly oxygenated blood from the lungs to the heart. In systemic circulation, the vessels that carry oxygen-rich blood are the systemic arteries, providing blood rich in oxygen to the body's tissues.
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