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In the human circulatory system, which blood vessel carries oxygenated blood from the lungs to the left atrium of the heart?
Pulmonary Artery
Aorta
Pulmonary Vein
Superior Vena Cava
Pulmonary Vein
The pulmonary vein is the unique blood vessel responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart. Unlike most veins in the systemic circulation that carry deoxygenated blood, pulmonary veins transport oxygen-rich blood after gas exchange occurs in the pulmonary capillaries.
The pulmonary vein is the unique blood vessel responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart. Unlike most veins in the systemic circulation that carry deoxygenated blood, pulmonary veins transport oxygen-rich blood after gas exchange occurs in the pulmonary capillaries.
Think of the pulmonary vein as a dedicated express delivery truck carrying freshly manufactured goods (oxygen) straight from the factory (lungs) to the main distribution warehouse (left atrium) of the heart.
Remember 'PAW' тАФ Pulmonary Artery = to the lungs (deoxygenated), Pulmonary Vein = away from the lungs (oxygenated). Or remember that Veins usually carry deoxygenated blood, except for the Pulmonary Vein which is the exception.
During pulmonary circulation, deoxygenated blood is pumped from the right ventricle into the lungs via the pulmonary artery, where it releases carbon dioxide and absorbs oxygen through the alveoli. The newly oxygenated blood then collects in the pulmonary venules and travels through the pulmonary veins directly into the left atrium, ready to be pumped into the left ventricle and out to the rest of the body via the aorta.
Pulmonary veins are the only veins in the human body that carry oxygenated blood.
They empty into the left atrium of the heart.
There are typically four pulmonary veins (two from each lung).
Human circulatory system physiology
Cardiovascular diagnostics and pathology studies
Standard value, constant, or property: Normal human heart has four pulmonary veins.
Option A (Pulmonary Artery) carries deoxygenated blood from the right ventricle to the lungs. Option B (Aorta) carries oxygenated blood from the left ventricle to the rest of the body. Option D (Superior Vena Cava) returns deoxygenated blood from the upper body to the right atrium.
C is correct тАФ The pulmonary vein is responsible for carrying oxygenated blood from the lungs to the left atrium of the heart.
Always remember that pulmonary vessels are inverted in function compared to systemic vessels: pulmonary arteries carry deoxygenated blood, while pulmonary veins carry oxygenated blood.
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