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O-LevelBiologyTransport in Humans5090/11 · May/June 2012 · Q131 Mark

The diagram shows the direction of blood flow in the human body. [Figure 13.1] Which numbered stages have blood containing the most oxygen?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A1 and 2
B2 and 3
C3 and 4
D4 and 1

✓ Correct answer

A: 1 and 2

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About this question

Topic
Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source
O-Level Biology, May/June 2012 Paper 1 Variant 1, question 13.

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