Which vessel carries oxygenated blood from the heart to the systemic circulation?

• A. Pulmonary artery
• B. Aorta
• C. Pulmonary vein
• D. Superior vena cava

Answer: (B)

Oxygenated blood to the systemic circulation is carried by the aorta, the main artery that leaves the left ventricle. After the left ventricle pumps, blood enters the aorta and is distributed through arteries to all body tissues, delivering oxygen. The other vessels have different roles: the pulmonary artery carries deoxygenated blood from the right ventricle to the lungs, the pulmonary veins return oxygenated blood from the lungs to the left atrium, and the superior vena cava brings deoxygenated blood from the upper body back to the right atrium. This combination explains why the aorta is the vessel responsible for delivering oxygen-rich blood to the systemic circulation.