The diagram shows the human circulatory system - Edexcel - GCSE Biology - Question 5 - 2016 - Paper 1
Question 5
The diagram shows the human circulatory system.
(a) (i) Name blood vessel W.
Put a cross (X) in the box next to your answer.
A Aorta
B Pulmonary artery
C Pulmonary... show full transcript
Worked Solution & Example Answer:The diagram shows the human circulatory system - Edexcel - GCSE Biology - Question 5 - 2016 - Paper 1
Step 1
Name blood vessel W.
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Answer
Blood vessel W is the pulmonary vein (C). This vessel carries oxygenated blood from the lungs back to the heart.
Step 2
Explain how blood is moved from chamber Y to the lungs.
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Answer
Chamber Y is identified as the right atrium of the heart.
Deoxygenated blood flows into the right atrium from the body.
When the heart muscle contracts, blood is pushed into the right ventricle.
This blood then flows through the pulmonary valve into the pulmonary artery, which carries it to the lungs.
Step 3
Explain how blood is moved from chamber Y to the lungs.
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Answer
In the lungs, gas exchange occurs: carbon dioxide is released and oxygen is absorbed. The blood then becomes oxygenated and is ready to return to the heart.
