PATHOLOGY

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: -The systemic vessels are arteries that carry oxygen-rich blood from the heart’s left ventricle to the tissues in all parts of the body. They then return oxygen-poor blood through the veins back to the heart’s right atrium.

Detailed explanation-3: -Arteries carry blood away from the heart, while veins return blood to the heart. Pulmonary circulation carries oxygen-poor blood away from the heart to the lungs, while systemic circulation carries oxygen-rich blood away from the heart to the body.

Detailed explanation-4: -Your pulmonary veins are the only veins in your body that carry oxygen-rich blood. All your other veins carry oxygen-poor blood. Similarly, your pulmonary arteries are the only arteries that carry oxygen-poor blood. All the rest of your arteries carry oxygen-rich blood.