Figure 17 shows a cross-section of an artery and a vein - Edexcel - GCSE Biology - Question 9 - 2022 - Paper 1
Question 9
Figure 17 shows a cross-section of an artery and a vein.
(i) Explain one difference between the artery wall and the vein wall shown in Figure 17.
(ii) Name one str... show full transcript
Worked Solution & Example Answer:Figure 17 shows a cross-section of an artery and a vein - Edexcel - GCSE Biology - Question 9 - 2022 - Paper 1
Step 1
Explain one difference between the artery wall and the vein wall shown in Figure 17.
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Answer
The artery wall is thicker and more muscular compared to the vein wall. This thickness is necessary to withstand and maintain the higher blood pressure found in arteries, while veins have lower pressure and thus can have thinner walls.
Step 2
Name one structure that is found in veins but not found in arteries.
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Answer
One structure found in veins but not found in arteries is the valves, which help prevent the backflow of blood and ensure it flows in one direction towards the heart.
