The only type of artery in the body which carries deoxygenated blood is _________.

The pulmonary artery is unique among the arteries in the body because it is responsible for carrying deoxygenated blood away from the heart to the lungs. In this process, blood becomes oxygenated as it passes through the lungs, where it exchanges carbon dioxide for oxygen. This is in contrast to most other arteries, such as the aorta, coronary arteries, and carotid arteries, which transport oxygenated blood to various tissues and organs throughout the body.

The aorta carries oxygen-rich blood from the left ventricle of the heart to the rest of the body. Coronary arteries supply oxygenated blood to the heart muscle itself, while carotid arteries deliver oxygenated blood to the head and neck. So, the pulmonary artery stands out as the only artery performing the function of transporting deoxygenated blood, evidencing the distinction in its role compared to other arteries in the circulatory system.