Definition: 'aorta' refers to a vessel that carries blood, specifically the right ventricle's return flow from the pulmonary artery. Definition: Aorta (aorta) is the main blood vessel in the lower part of the heart that delivers oxygenated blood back to the lungs. The term "oxygenated" means it contains oxygen. Aortic arch refers to the area where aorta enters the heart. It's where the right ventricle and pulmonary artery exit the heart, with the aorta branching off into the major branches of the pulmonary arteries as you ascend the lung. In verse 30 in Matthew Chapter 17: "Then they were troubled; for they found two men who had fallen asleep during the night, speaking with one another, talking many things with one another."