Question

Which of the following carries deoxygenated blood only?
a. Carotid artery
b. Pulmonary artery
c. Pulmonary vein
d. Aorta

Answer 1

Hint: Generally, arteries carry oxygenated blood from the heart to the organs and tissues of the body. Veins carry deoxygenated blood from the organs towards the heart. But there is only one pair of arteries and vein that is an exception. This pair is associated with lungs one carries oxygenated blood to the lungs and the other carries deoxygenated lungs from the lungs.

Complete answer:
Arteries are designed to carry oxygen-loaded blood from the heart to other parts of the body whereas veins are supposed to carry deoxygenated blood to the heart collected from the organs. The group of blood vessels belonging to a particular organ is distinguished by various names.
The carotid group of blood vessels caters to the brain, neck, and face region. The carotid arteries are responsible for supplying oxygenated blood to the brain, neck, and face area.
Therefore, option (a) is the incorrect answer.

The aorta is an artery that carries blood away from the heart and branches off to other arterioles and capillaries, to transport oxygenated blood to the body organs and tissues. Being the main artery arising from the heart, it is not the correct option. Therefore, option (d) is also not the correct.

The pulmonary group of arteries caters to the lungs. The pulmonary blood vessels are divided into arteries and veins. The artery is responsible for carrying deoxygenated blood towards the heart and not the oxygenated blood. The pulmonary vein is the one carrying oxygenated blood to the lungs from the heart. This is where their functions are reversed and this is the exception of arteries and veins.

Therefore, option (c) is not the correct option but a correct answer is an option (b).

Note:
Not only the pulmonary artery and vein but another artery is there which is different in function when it comes to the standard function of arteries and veins. That artery is the umbilical artery that carries deoxygenated blood from the fetus to the mother.
But this artery is not always considered because it is not a permanent part of the body. It only develops when the mother is pregnant and the fetus makes a connection with the mother.