Which vessel carries oxygenated blood from the heart to the rest of the body?

• A. Aorta
• B. Pulmonary artery
• C. Pulmonary vein
• D. Vena cava

Answer: (A)

In systemic circulation, the left ventricle sends oxygen-rich blood into the aorta, the main artery that leaves the heart. From the aorta, blood travels through arteries to reach every tissue, delivering oxygen and nutrients. This makes the aorta the vessel that carries oxygenated blood from the heart to the rest of the body. The other vessels have different roles: the pulmonary artery carries blood to the lungs to pick up oxygen, the pulmonary veins return oxygenated blood from the lungs to the heart, and the vena cava bring deoxygenated blood back from the body to the heart.