February/March 2026 Paper 22

2026 · 40 questions · 40 parts · 40 marks

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15Heart CirculationMedium1 mark
Atria and ventricles are chambers in the heart. Which statements describe the relative thickness of the muscle walls of these chambers?
  1. 1
    The walls of the atria are thicker than the walls of the ventricles.
  2. 2
    The walls of the ventricles are thicker than the walls of the atria.
  3. 3
    The wall of the left ventricle is thicker than the wall of the right ventricle.
  4. 4
    The wall of the right ventricle is thicker than the wall of the left ventricle.