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Cambridge IGCSE Biology practice

Which statement is true about the muscle walls of the heart?

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MCQ

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cambridge_mcq

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Topic

Heart

Exam-style question

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Which statement is true about the muscle walls of the heart?.

  1. A.Right atrium has the thickest wall
  2. B.Left ventricle has the thinnest wall
  3. C.Ventricles have thicker walls than atria
  4. D.Atria have thicker walls than ventricles

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Paper 4 structured question: Heart

Paper 4Theory (Extended)5 marks

Diagram Description

Diagram of the heart showing muscle wall thickness

A diagram shows the heart with labels indicating the thickness of the muscle walls of the left ventricle, right ventricle, left atrium, and right atrium. The left ventricle wall is the thickest, the right ventricle wall is thinner, and both atria have thin walls.

ChamberMuscle Wall Thickness
Left ventricleThickest
Right ventricleThinner
Left atriumThin
Right atriumThin
  1. a

    Explain Explain why the muscle wall of the left ventricle is thicker than that of the right ventricle.

    Aim for approximately 3 distinct marking points.

    [3]
  2. b

    State State one difference between the muscle walls of the atria and the ventricles.

    Aim for approximately 2 distinct marking points.

    [2]