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Human Heart Learning App Download | Class 9 Biology Learning Apps (Android & iOS)

Class 9 Biology MCQ: Complete Course

Human Heart MCQ App Download & PDF e-Book | 237

MCQ: 237

Considering the structure of human heart, the deoxygenated blood is received by

  1. left atrium
  2. right atrium
  3. upper atrium
  4. lower atrium

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