(a) Name the only artery that carries carbon dioxide-rich blood.
(b) Why is it called an artery if it does not carry oxygen-rich blood?
(a) The pulmonary artery is the only artery that carries carbon dioxide-rich blood.
(b) The main function of arteries is to carry blood away from the heart, towards the other organs. As the pulmonary artery carries blood away from the heart, to the lungs, it is called an artery.