Q: 253 (SSC/NA)


Which of the following brings back deoxygenated blood from different parts of human body to heart?
question_subject: 
Science
question_exam: 
SSC
stats: 
0,35,29,35,22,2,5
keywords: 
{'veins': [2, 0, 0, 0], 'blood': [5, 0, 0, 1], 'arteries': [0, 1, 0, 0], 'human body': [40, 2, 44, 29], 'lungs': [3, 0, 0, 1], 'heart': [1, 0, 0, 0], 'nerves': [0, 0, 0, 1], 'different parts': [1, 0, 0, 0]}

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