ANATOMY

Detailed explanation-1: -A crucial difference is that your pulmonary artery carries oxygen-poor (deoxygenated) blood, while your aorta carries oxygen-rich (oxygenated) blood. In fact, your pulmonary arteries are the only arteries in your body that carry oxygen-poor blood.

Detailed explanation-2: -Pulmonary circulation facilitates the process of external respiration: Deoxygenated blood flows into the lungs. It absorbs oxygen from tiny air sacs (the alveoli) and releases carbon dioxide to be exhaled.

Detailed explanation-3: -De-oxygenated blood from the body’s somatic cells travels to the right atrium, then into the right ventricle, and through the main pulmonary artery and its branches before blood enters the lungs for oxygenation and gas exchange.

Detailed explanation-4: -Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left side of the heart. This differentiates the pulmonary veins from other veins in the body, which carry deoxygenated blood from the rest of the body back to the heart.