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 pulmon... 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
The correct answer for blood vessel W is C - pulmonary vein. This vessel carries oxygenated blood from the lungs back to the heart.
Step 2
Deoxygenated blood enters the heart in the chamber labelled Y.
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Answer
Y is the right atrium. Blood flows into the right ventricle as the atrium contracts. The right ventricle then contracts, pushing the blood through the pulmonary artery to the lungs.
Step 3
Explain how blood is moved from chamber Y to the lungs.
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Answer
Blood from Y (the right atrium) diffuses through the tricuspid valve into the right ventricle. When the right ventricle contracts, it sends the deoxygenated blood through the pulmonary artery, which leads to the lungs for oxygenation.
