The human circulatory system is a double circulatory system.
Describe the route taken by blood from the vena cava to the lungs.
Explain what is meant by a double circulatory system.
Explain one advantage of a double circulatory system.
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.