Question

Name the blood vessel with the lowest concentration of carbon dioxide.

• A. Pulmonary vein
• B. Pulmonary artery
• C. Inferior vena cava
• D. Superior vena cava

Answer 1

The correct option is A

Pulmonary vein

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.