Which vessel carries deoxygenated blood from the heart to the lungs for oxygenation?

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Blood is routed from the right side of the heart to the lungs through the pulmonary trunk, the vessel that leaves the heart to begin the pulmonary circulation. It carries deoxygenated blood from the right ventricle to the lungs where gas exchange happens. After picking up oxygen, that blood returns to the heart via the pulmonary veins into the left atrium and then moves on to the systemic circulation. The aorta carries oxygenated blood to the body, the pulmonary veins bring oxygenated blood back to the heart, and the superior vena cava returns deoxygenated blood from the upper body to the right atrium.