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The left ventricle pumps oxygenated blood into the aorta, which is the body's main artery. This vessel carries oxygen-rich blood from the heart to the rest of the body, ensuring that tissues and organs receive the oxygen and nutrients they need for proper function. The aorta branches off into smaller arteries that further distribute blood throughout the body.

In contrast, other vessels like the pulmonary artery carry deoxygenated blood from the heart to the lungs for oxygenation, whereas the inferior vena cava brings deoxygenated blood back to the heart from the lower body. The coronary artery specifically supplies blood to the heart muscle itself, not the body at large. Thus, the aorta is the key vessel through which the left ventricle sends its oxygenated output.