Which best describes arteries and veins? both have valves. both are thick, muscular, and elastic. arteries carry blood back to the heart; veins connect arteries and capillaries. arteries carry blood away from the heart; veins carry blood back to the heart.

Arteries carry blood away from the heart; veins carry blood back to the heart.

An artery is a blood vessel which exhibit thick walls. It do not posses valves, it exhibit a narrow lumen and it carries oxygenated blood away from the heart to different organs of the body. The veins are the blood vessels which exhibit thin walls. Valves are present in them, their lumen is wide. The veins bring deoxygenated blood from all the body cells and organs back to the heart.

Arteries carry blood away veins carry blood towards the heart. A= away that's how I've always remembered

a chair, a bed, and a toothbrush

explanation:

the answer to your question is:

c. complementary base-pairing