Which of the following vessels carries oxygenated blood?
A.
Inferior vena cava
B.
Pulmonary vein
C.
Pulmonary artery
D.
Superior vena cava
The correct answer is (d) Pulmonary vein.
The pulmonary vein is the blood vessel that carries oxygenated blood. It carries blood from the lungs back to the heart.
To understand why the pulmonary vein carries oxygenated blood, let’s go through a quick overview of the circulatory system. The heart is responsible for pumping blood throughout the body. There are two main types of blood vessels: arteries and veins.
Arteries carry oxygenated blood away from the heart to different parts of the body, while veins carry deoxygenated blood back to the heart. However, there is one exception – the pulmonary veins. These veins are unique because they carry oxygenated blood instead of deoxygenated blood.
In the lungs, oxygen from the air we breathe enters the bloodstream, and carbon dioxide, a waste product, is removed. This oxygenation process happens in the tiny air sacs in the lungs called alveoli. Once the blood is oxygenated, it is carried back to the heart through the pulmonary veins.
So, in summary, the pulmonary vein is the blood vessel that carries oxygenated blood from the lungs back to the heart.
Final answer:
The pulmonary vein is the blood vessel that carries oxygenated blood, making it unique among veins since it carries oxygen-rich blood from the lungs to the heart.
Explanation:
The blood vessel that carries oxygenated blood is d) the pulmonary vein. The pulmonary veins are unique as they are the only veins in the body that carry oxygen-rich blood.
They return this blood from the lungs to the left atrium of the heart. In contrast, the inferior vena cava (option a) carries deoxygenated blood from the lower half of the body back to the heart, and the pulmonary artery (option b) is the only artery that carries deoxygenated blood, taking it from the heart to the lungs for oxygenation, while the coronary sinus (option c) collects deoxygenated blood from the heart muscle itself and channels it back to the right atrium.
The correct answer is Pulmonary vein. The pulmonary veins carry oxygenated blood from the lungs back to the heart. These veins are responsible for returning oxygen-rich blood to the left atrium of the heart, which then pumps it into the left ventricle and eventually into the aorta, supplying oxygen to the rest of the body.