NEET BIOLOGY

Detailed explanation-1: -The pulmonary vein brings oxygenated blood back from the lungs to the heart. The lungs take care of pulling out the carbon dioxide from the blood and adding more oxygen to it. Therefore, the pulmonary vein will have the highest concentration of oxygen as well as the lowest concentration of carbon dioxide.

Detailed explanation-2: -The pulmonary vein is the vein which does not carry carbon dioxide to lungs and pulmonary artery is the artery which carries oxygen poor blood that is carbon dioxide to other body parts.

Detailed explanation-3: -The pulmonary artery is a big artery that comes from the heart. It splits into two main branches, and brings blood from the heart to the lungs. At the lungs, the blood picks up oxygen and drops off carbon dioxide. The blood then returns to the heart through the pulmonary veins.

Detailed explanation-4: -Pulmonary artery is the only artery that carries carbon dioxide rich blood to lungs for re-oxygenation.

Detailed explanation-5: -The left side pumps oxygenated blood (high in oxygen and low in carbon dioxide) to the organs of the body.