Why is the muscular wall of the left ventricle thicker than that of the right ventricle?
It generates higher pressure for the systemic circulation.
It receives higher pressure from the pulmonary circulation.
It stores more blood between successive heart contractions.
It transfers more oxygen directly into the blood plasma.
42 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.