Concept: Arteries are the blood vessels that carry blood away from the heart to the body.Explanation: Oxygenated blood is pumped from the heart into arteries.Arteries branch into smaller vessels and deliver this blood to tissues.Veins return deoxygenated blood back to the heart.Capillaries connect arteries to veins, and venules are small veins.Therefore, arteries are the vessels that carry oxygenated blood away from the heart.Answer: A. Arteries