Question

Why are the pulmonary veins called veins if they carry oxygenated blood? Why are pulmonary arteries called arteries if they carry deoxygenated blood?

Answer 1

To maintain life, blood must always circulate. It transports oxygen from the air we breathe to all of our cells. The heart's pumping causes blood to flow via the arteries, capillaries, and veins. For gas exchange, one pair of blood veins circulates blood across the lungs. The rest of the body is fueled by the other vessels. Continue reading to learn more about the activities of the circulatory system.

Complete answer:
Except for the pulmonary veins, all veins in the body deliver deoxygenated blood to the heart. Remember that oxygen diffuses from the alveoli to the deoxygenated blood during internal respiration. The blood becomes oxygenated as a result of this.
The pulmonary veins are responsible for transporting oxygenated blood from the lungs to the heart. Regardless of whether the blood is deoxygenated or oxygenated, they are still called veins because they deliver blood to the heart.
Except for the pulmonary arteries, all arteries in the body convey oxygenated blood out from the heart. Remember that when deoxygenated blood is brought back to the heart via systemic circulation, it must be reoxygenated.
The pulmonary arteries are responsible for transporting deoxygenated blood to the lungs, where it can be reoxygenated through diffusion. Regardless of whether the blood is deoxygenated or oxygenated, they are still referred to as arteries since they convey blood out from the heart.
Because it shares more morphological and physiological characteristics with other arteries than with veins, a pulmonary "artery" is classed as an artery.
The pulmonary artery is a blood vessel that transports blood from the heart to the lungs, where it is oxygenated. It's special because the blood inside hasn't been "oxygenated" yet because it hasn't travelled through the lungs. The blood pressure in arteries is higher than in other regions of the circulatory system.
Pulmonary veins transport oxygenated blood from the lungs to the heart's left atrium. Despite the fact that it delivers oxygenated blood, this large conduit is nonetheless classified as a vein since it transports blood to the heart.

Note:-
Pulmonary circulation is the movement of blood from the heart to the lungs. It delivers deoxygenated blood to the lungs, where it is oxygenated and carbon dioxide is released. After that, the oxygenated blood returns to the heart. The heart and the rest of the body are connected through systemic circulation. It transports oxygenated blood to cells while also returning deoxygenated blood to the heart.