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Free O Level Biology Quiz App Download | Mode of action of heart Book PDF

O Level Biology Learning Guide: Certification Test 1644

Mode of action of heart Quiz App & e-Book: MCQ 1644

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MCQ: 1644

Backflow of blood into the atria is prevented through

  1. bicuspid valves
  2. tricuspid valves
  3. mitral valve and the chordae tendineae
  4. semi lunar valves

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O Level Biology Quiz App (Android & iOS)

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