MEDIUM
Lower Secondary Stage 8
IMPORTANT
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The diagram shows part of the circulatory system. Write down the letter of the vessel that carries blood that is lower in oxygen.

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Important Questions on Respiration and Circulation

MEDIUM
Lower Secondary Stage 8
IMPORTANT

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In the diagram, the wall of chamber W is thicker than the chamber on the other side of the heart. Explain why this is. 

MEDIUM
Lower Secondary Stage 8
IMPORTANT
Explain why the circulatory system is described as a double circulatory system.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Amina takes her pulse. She counts 19 beats in 15 seconds. Calculate her pulse rate in beats per minute (bpm).
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Describe how Amina could test how her pulse is affected by exercise.
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Write a prediction about how you think Amina's pulse rate will be affected by exercise. 
MEDIUM
Lower Secondary Stage 8
IMPORTANT
Explain why Amina's pulse rate increase after exercise. Write your prediction.
MEDIUM
Lower Secondary Stage 8
IMPORTANT

Draw one line to match the part of the blood with its function.

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MEDIUM
Lower Secondary Stage 8
IMPORTANT

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The diagram shows the parts of the human respiratory system. Name the parts labelled A.