It is the pulmonary arteries; which are the only arteries in the human body that carry deoxygenated blood. FYI-It is the pulmonary veins that carry oxygenated blood from the lungs to the heart; which are the only veins in the human body to carry oxygen rich blood.he pulmonary veins, carrying blood from the lungs to the left atrium of the heart, are the only veins carrying oxygenated blood. Oxygen rich blood from the lungs is returned to the heart via the pulmonary vein.