1 Fig. 1.1 is a diagram of the human gas exchange system. A region B Fig. 1.1 (a) (i) Identify using a label line and a label on Fig. 1.1: • a lung • the diaphragm. [2] (ii) State the name of structure A in Fig. 1.1. … [1] (iii) Oxygen molecules pass through structure A on their way to the red blood cells. State the names of three other structures in the gas exchange system that oxygen molecules must pass through on their way to the red blood cells. 1 … 2 … 3 … [3] (iv) State the name of the process that moves oxygen into the red blood cells. … [1] (b) Fig. 1.2 is a magnified image of the exchange surface shown in region B in Fig. 1.1. Fig. 1.2 (i) State the name of the main blood vessel that delivers blood to the lungs. … [1] (ii) The gas exchange surface shown in Fig. 1.2 is permeable to make gas exchange efficient. List two other features of gas exchange surfaces. 1 … 2 … [2] (c) Oxygen concentration is higher in inspired air than in expired air. State one other way the composition of inspired air differs from the composition of expired air. … [1] [Total: 11]

1(a)(i) lung correctly identified with a label and a label line ; diaphragm correctly identified with a label and a label line ; 2 1(a)(ii) trachea ; 1 1(a)(iii) any three from : mouth / nose ; larynx ; bronchus / bronchi ; bronchioles ; alveoli ; capillary wall / AW ; plasma ; 3 1(a)(iv) diffusion ; 1 1(b)(i) pulmonary artery ; 1 1(b)(ii) any two from : large surface area ; thin / one cell thick / AW ; good blood supply / many capillaries ; short diffusion, distance / pathway ; 2 1(c) lower carbon dioxide concentration / less water vapour ; 1 To earn marks, you must correctly identify and label the lung and diaphragm on the diagram using both a label line and a label. You also need to name structure A as the trachea, list three other correct structures oxygen passes through (e.g., nose, larynx, bronchi), state 'diffusion' as the process, and identify the 'pulmonary artery' as the main blood vessel. Finally, you must provide two correct features of the exchange surface, such as large surface area or thin walls.

1 (a) Fig. 1.1 is a diagram of part of the human circulatory system. … … … … to organs to organs Fig. 1.1 (i) Identify and label on Fig. 1.1 in the spaces provided: • the left ventricle • the right atrium • the septum • a valve [4] (ii) Complete the flow chart of the circulatory system by writing the correct blood vessels from the list, in the spaces provided. The arrows show the direction of blood flow. Each word or phrase may be used once, more than once or not at all. aorta pulmonary artery pulmonary vein renal artery renal vein vena cava body  …  heart  …  lungs  …  heart  …  body [4] (b) A healthy diet is recommended to reduce the risk of coronary heart disease (CHD). State three other risk factors for CHD. 1 … 2 … 3 … [3] [Total: 11]

1(a)(i) left ventricle ; septum ; valve ; right atrium ; 4 labels in this order starting clockwise from top right side of the diagram 1(a)(ii) vena cava ; pulmonary artery ; pulmonary vein ; aorta ; 4 1(b) any three from: stress ; smoking ; genetic (predisposition) ; age ; sex ; AVP ;;; e.g. lack of exercise / high blood pressure / high (blood) cholesterol / diabetes / obesity 3

5 (a) Fig. 5.1 is a diagram of a human heart. blood vessel A – from the body blood vessel B – to the lungs blood vessel C – to the body blood vessel D – from the lungs Fig. 5.1 (i) Use label lines and labels to identify these structures on Fig. 5.1: • atrium • septum • ventricle • valve [4] (ii) Identify the letter or letters of all the blood vessels from Fig. 5.1, that: are arteries … is the pulmonary vein … . [2] (b) The activity of the heart can be monitored by measuring the pulse rate. State two other ways of monitoring the activity of the heart. 1 … 2 … [2] (c) Coronary heart disease (CHD) is caused by a blockage of blood vessels in the heart. (i) State the name of the blood vessels that become blocked. … [1] (ii) State three risk factors for developing CHD. 1 … 2 … 3 … [3] [Total: 12]

2(c) any three from: asexual reproduction: sexual reproduction: 1 both produce offspring / AW 2 one parent two parents 3 genetically identical offspring / clone genetically different offspring 4 no involvement of gametes (named) gametes 5 no fertilisation fertilisation / fusion of gametes 6 no variation variation 7 fast slow 8 mitosis meiosis (and mitosis) 9 less energy required more energy required ;;; 3 one mark per row response does not have to be in a table

6 (a) The activity of the heart can be monitored by measuring the pulse rate. Two students measured their pulse rates before, during and after exercise. The results are shown in Fig. 6.1. 0 20 40 60 80 100 120 140 160 180 0 5 10 15 20 25 time / minutes pulse rate / per minute 30 35 40 45 50 Key: student A student B before exercise during exercise after exercise Fig. 6.1 (i) Describe the changes in the pulse rates shown in Fig. 6.1 for student A and student B. … … … … … … … [4] (ii) Calculate the percentage change in the pulse rate between 0 and 15 minutes for student A. Give your answer to the nearest whole number. Space for working. … % [3] (iii) State two other methods that can be used to monitor the activity of the heart. 1 … 2 … [2] (b) Exercise levels, environmental temperature and changes in water intake can affect the volume and concentration of urine produced. Complete the sentences by circling the correct words in bold. The first sentence has been done for you. More exercise causes the volume of urine to increase / decrease / stay the same and the concentration of urine to increase / decrease / stay the same. A greater intake of water causes the volume of urine to increase / decrease / stay the same and the concentration of urine to increase / decrease / stay the same. A higher environmental temperature causes the volume of urine to increase / decrease / stay the same and the concentration of urine to increase / decrease / stay the same. [2] [Total: 11]

6(a)(i) 1 pulse rates for both students increase, during exercise / at 10–15 minutes / for 5 minutes ; 2 pulse rate for both students plateau, during exercise / at 15–25 minutes / for 10 minutes / until 25 minutes ; 3 pulse rate for both students decreases, after exercise / at 25–40 minutes / for 15 minutes / until 40 minutes ; 4 both students, took the same amount of time to recover from exercise / get back to the same pulse rate as before exercise / AW ; 5 pulse rate for student B increases more than student A / AW ; 6 comparative data quote / manipulation, with units ; 4 6(a)(ii) 94(%) ;;; 3 MP1 correct readings from graph of 64 and 124 MP2 correct calculation, i.e. 93.75(%) ecf wrong graph readings. MP3 correct rounding to whole number ecf MP2 6(a)(iii) any two from: ECG ; listening to the closing of the valves ; AVP ; 2 6(b) (second sentence) ‘increase’ circled and then ‘decrease’ circled ; (third sentence) ‘decrease’ circled and then ‘increase’ circled ; 2 To earn marks, you must describe that both students' pulse rates increase during exercise, plateau during exercise, and decrease after exercise, taking the same time to recover. You also need to state that student B's pulse rate increases more than student A's, and provide comparative data with units. For the calculation, you must correctly read the initial and peak pulse rates from the graph, calculate the percentage change, and round it to a whole number. Finally, you need to state two other ways to monitor heart activity, such as ECG or listening to valve closing, and correctly circle 'increase' then 'decrease' in the second sentence, and 'decrease' then 'increase' in the third sentence.

Cambridge IGCSE Biology · 0610

IGCSE Biology (0610) Transport in animals past paper questions

These questions test the heart, blood vessels, blood, and the circulatory system.

215 free questions from 2017–2021, each with its marking scheme. Open the full topical bank to filter by subtopic, paper, and year.

Transport in animals in IGCSE Biology 0610 exams, 2020–2025

Across 2020–2025, Transport in animals accounted for 248 questions worth 942 marks in Cambridge IGCSE Biology (0610) papers.

By year
Year	Questions	Marks
2020	37	89
2021	51	190
2022	38	126
2023	45	235
2024	40	158
2025	37	144

Most-tested subtopics

9.4 Blood391 marks
9.3 Blood vessels341 marks
9.2 Heart325 marks

Appears in

Paper 1 · 88 qs
Paper 2 · 99 qs
Paper 3 · 30 qs
Paper 4 · 26 qs
Paper 5 · 3 qs
Paper 6 · 2 qs

All most-tested Biology topics

2021 May/Jun · Paper 3 · Q1 · 11 marks
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2021 Oct/Nov · Paper 3 · Q1 · 11 marks
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2021 May/Jun · Paper 3 · Q5 · 12 marks
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2021 May/Jun · Paper 3 · Q6 · 11 marks
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2021 May/Jun · Paper 1 · Q5 · 1 mark
Marking scheme
Mark scheme — 2021 Paper 1 Q5
Answer: C
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