Question

Which blood vessel does not carry any carbon dioxide?

Answer 1

Hint: Blood vessels which carry deoxygenated blood from other parts of the body to the heart are called veins. Veins carry carbon dioxide in the blood except for the pulmonary vein that carries oxygenated blood from the lungs to the heart. So the pulmonary artery and pulmonary vein does not carry carbon dioxide.

Complete Explanation:
The pulmonary arteries carry blood from the right part of the heart to lungs. In medical terms pulmonary means carrying oxygen, something which affects lungs. The blood carries oxygen and other nutrients to your cells. There is an exception in both the vessels.
Artery carries oxygen rich blood into the heart and lungs and other body parts while veins carry deoxygenated blood from other parts of the body. But the exception is out of all veins. 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.
The pulmonary veins are the four main pulmonary veins two from each lung that drain into the left atrium of the heart. The pulmonary veins are part of the pulmonary circulation. Two main pulmonary veins emerge from each lung hilum, receiving blood from three or four bronchial veins a piece and draining into the left atrium. There are typically four pulmonary veins – right superior- drains the right upper and middle lobes. Right inferior drains the right lower lobe. Left superior.

Note:
As part of the pulmonary circulation, they carry oxygenated blood back to the heart as opposed to the veins of the systemic circulation which carry deoxygenated blood. A rare genetic defect of the pulmonary veins can cause them to drain into the pulmonary circulation. In the whole part this is known as a total anomalous pulmonary venous connection or partial anomalous pulmonary connection.