Question : Which vein brings clean blood from the lungs into the heart ?
Option 1: Renal Vein
Option 2: Pulmonary Vein
Option 3: Vena Cava
Option 4: Hepatic Vein
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Correct Answer: Pulmonary Vein
Solution : The correct answer is pulmonary vein.
Pulmonary vein carry clean blood from lungs to heart. Although veins carry impure blood from body organs to heart but pulmonary vein carries pure blood from lungs to heart and from there arteries carries it to various parts of body. On the contrary pulmonary artery carries impure blood from heart to lungs. This system of circulation is known as pulmonary circulation.
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