What unique characteristic does the pulmonary artery have?

The pulmonary artery uniquely carries blood that is depleted of oxygen. In the human circulatory system, most arteries transport oxygen-rich blood away from the heart to various tissues and organs. However, the pulmonary artery is distinct because it transports deoxygenated blood from the right ventricle of the heart to the lungs. In the lungs, carbon dioxide is exchanged for oxygen, hence allowing the blood to become oxygen-saturated before it returns to the heart through the pulmonary veins. This functionality is critical for the process of respiration, meaning the pulmonary artery plays a vital role in both the circulatory and respiratory systems.