Class 9 Biology MCQs (Grade 9) From Textbook

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Class 9 Biology MCQs – Certification Test 237

Human Heart Trivia (Question 237) – Learning App & e-Book Download

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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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