Aorta Definition:The aorta is the artery that carries oxygenated blood to the entire body. Function:The function of the aorta is to carry oxygenated blood throughout the body. Location:The aorta is located at the top of the heart. Type of circulation:The aorta is part of the systemic circulation. Pulmonary Artery definition:The pulmonary artery carries deoxygenated blood to the lungs. function:The function of the pulmonary artery is to deliver blood to the lungs for oxygenation. location:pulmonary artery is located directly beneath the aorta. type of circulation: The pulmonary trunk with left and right arteries are part of the pulmonary circulation.