What is the difference between Aorta and Pulmonary Arteries?

The aorta brings deoxygenated blood to the lungs for oxygenation. The aorta expands when blood is pumped from the aorta to the left ventricle. It is an artery that dutifully carries oxygenated blood from the left ventricle to other parts of the body. The pulmonary artery transports deoxygenated blood from the right ventricle to the lungs.
The partitions of the aorta are somewhat thicker because of their ability to work under extreme stress of the blood inside it. The pulmonary artery comes from the pulmonary trunk within its proper ventricle of coronary heart. The aorta is placed on top of the heart, while the pulmonary artery is positioned beneath the aorta.