(a) The pulmonary artery is the only artery that carries carbon dioxide-rich blood. A pulmonary artery is a set of blood vessels that are related to the lungs, which functions by carrying deoxygenated blood from the right ventricle to the lungs for oxygenation. It is one of the few arteries that carry deoxygenated 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.
- Compared to other blood vessels, arteries have thick walls and are located superficially.
- This is mainly because these blood vessels perform the critical function of carrying oxygenated blood throughout the body under considerable pressure.
- In case these blood vessels have thinner walls, they would get damaged, which results in blood loss caused by the rupture of blood vessels.