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Class 9 Biology MCQs (Grade 9) From Textbook

Class 9 Biology MCQs – Certification Test 247

Human Heart MCQ (Question 247) – Study App & e-Book Download

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MCQ 247: The sac in which heart is enclosed is known as:

  1. megacardium
  2. monocardium
  3. pericardium
  4. pericardium

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