PATHOLOGY

Detailed explanation-1: -The artery is responsible for carrying deoxygenated blood towards the heart and not the oxygenated blood. The pulmonary vein is the one carrying oxygenated blood to the lungs from the heart. This is where their functions are reversed and this is the exception of arteries and veins.

Detailed explanation-2: -The pulmonary artery carries oxygen-poor blood from the right ventricle into the lungs, where oxygen enters the bloodstream. The pulmonary veins bring oxygen-rich blood to the left atrium. The aorta carries oxygen-rich blood to the body from the left ventricle.