IGCSE Co-ordinated Sciences (Double Award) 0654 · Biology · 64

0654.B9.2.01 — Identify in diagrams and images the structures of the mammalian heart, limited to: muscular wall, septum, left and right ventricles, left an: past paper questions

9 real questionsasked in 2 of the last 10 exam series2019–2025usually: Identify, State, Describe, Explain, Which

Real questions on 0654.b9.2.01 — identify in diagrams and images the structures of the mammalian heart, limited to: muscular wall, septum, left and right ventricles, left an

The newest 9 of 9 written questions. Open one to see it on the real paper.

0654/31 · October/November 2025 · Q3a(i)[2]
Identify the parts labelled Q and R on Fig. 3.1. Q
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0654/31 · October/November 2025 · Q3a(ii)[2]
Blood vessel P is an artery. Describe two differences between the structure of an artery and the structure of a vein.
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0654/31 · October/November 2025 · Q3b(i)[1]
State the name of the blood vessels that supply the muscular wall of the heart with oxygen.
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0654/31 · October/November 2025 · Q3b(ii)[2]
Lack of exercise is one possible risk factor for heart disease. State two other possible risk factors for heart disease.
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0654/31 · October/November 2025 · Q3b(iii)[2]
Physical activity increases heart rate. A person measures their heart rate before and after physical activity. Table 3.1 shows the results. Table 3.1 heart rate / beats per minute before physical activity 64 after physical activity 104 Calculate the percentage increase in heart rate. percentage increase = %
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0654/43 · October/November 2025 · Q3a(i)[2]
On Fig. 3.1: • draw a line and the letter S to identify the septum
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0654/41 · May/June 2025 · Q2c(ii)[3]
The doctor thinks the blood vessel labelled A in Fig. 2.1 is blocked. Explain why this causes a problem with the function of the heart. Include the name of blood vessel A in your answer.
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0654/31 · October/November 2019 · Q1a[2]
Use a label and a label line on Fig. 1.1 to identify the: • layer of muscle and elastic fibres • lumen.
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0654/21 · May/June 2019 · Q34[1]
Which diagram shows the lens being used as a magnifying glass?
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What examiners said

Some candidates correctly identified blood vessel A as the coronary artery. There was a good understanding that a blockage would restrict blood flow, but not all candidates explained why this would cause problems to the heart as directed in the question but instead explained impacts of circulation on the wider body.
— Examiner report, May/June 2025, 0654/41 Q2(c)(ii) (Cambridge)

A common error here was to choose option B, this being the only one showing the formation of a real, rather than a virtual, image.
— Examiner report, May/June 2019, 0654/21 Q34 (Cambridge)

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In the syllabus

64 0654.B9.2.01 — Identify in diagrams and images the structures of the mammalian heart, limited to: muscular wall, septum, left and right ventricles, left an

Identify in diagrams and images the structures of the mammalian heart, limited to: muscular wall, septum, left and right ventricles, left and right atria, one-way valves and coronary arteries
Describe the functioning of the heart in terms of the contraction of muscles of the atria and ventricles and the action of the valves 2 State that blood is pumped away from the heart in arteries and returns to the heart in veins 3 State that the activity of the heart may be monitored by: ECG (electrocardiogram), pulse rate and listening to sounds of valves closing 4 Investigate and describe the effect of physical 8 Explain the effect of physical activity on the activity on the heart rate heart rate 5 Describe coronary heart disease in terms of the blockage of coronary arteries and state the possible risk factors including: diet, lack of exercise, stress, smoking, genetic predisposition, age and sex 6 Discuss the roles of diet and exercise in reducing the risk of coronary heart disease

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