A red blood cell has just entered the left atrium. Which sequence shows its route before it next reaches the right atrium?
right ventricle →\rightarrow→ pulmonary artery →\rightarrow→ lungs →\rightarrow→ vena cava
left ventricle →\rightarrow→ pulmonary artery →\rightarrow→ lungs →\rightarrow→ pulmonary vein
right ventricle →\rightarrow→ aorta →\rightarrow→ body tissues →\rightarrow→ pulmonary vein
left ventricle →\rightarrow→ aorta →\rightarrow→ body tissues →\rightarrow→ vena cava
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.