Which among the following carries impure blood to human heart?

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Q: 277 (SSC/NA)
Which among the following carries impure blood to human heart?

question_subject: 

Science

question_exam: 

SSC

stats: 

0,1,9,4,3,1,2

keywords: 

{'pulmonary arteries': [1, 0, 1, 0], 'impure blood': [1, 0, 0, 0], 'pulmonary vein': [2, 0, 1, 1], 'aorta': [4, 0, 3, 0], 'human heart': [3, 0, 0, 0], 'vena cava': [3, 0, 0, 0]}

Option 1: Aorta - The aorta is not responsible for carrying impure blood to the human heart. It is the largest artery in the body and carries oxygenated blood from the heart to the rest of the body.

Option 2: Pulmonary vein - This is incorrect. The pulmonary veins carry oxygenated blood from the lungs to the heart.

Option 3: Pulmonary arteries - This is the correct answer. The pulmonary arteries carry deoxygenated blood from the heart to the lungs for oxygenation.

Option 4: Vena Cava - The vena cava carries deoxygenated blood from the body back to the heart. While it carries deoxygenated blood, it does not carry the impure blood to the heart.

So, the correct option is option 3, pulmonary arteries, which carries impure (deoxygenated) blood to the human heart.