Which of the following structures does not carry oxygenated blood?

The pulmonary arteries are responsible for carrying deoxygenated blood away from the heart to the lungs. In the process of pulmonary circulation, blood is sent to the lungs to release carbon dioxide and acquire oxygen. This is in contrast to other structures, such as the pulmonary veins, which transport oxygenated blood from the lungs back to the heart, and the aorta and coronary arteries, which distribute oxygen-rich blood from the heart to the rest of the body. Understanding this pathway of blood circulation is crucial for recognizing the roles of different vascular structures in the cardiovascular system.