O-LevelBiologyTransport in Humans5090/11 · Oct/Nov 2013 · Q131 Mark

What is the correct route for blood flow in a human?

Aleft atrium left ventricle → lungs → right ventricle → right atrium

Bleft atrium → left ventricle → right ventricle → right atrium → lungs

Cright atrium → right ventricle → left ventricle → left atrium → lungs

Dright atrium → right ventricle → lungs → left atrium → left ventricle

✓ Correct answer

D: right atrium → right ventricle → lungs → left atrium → left ventricle

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2013 Paper 1 Variant 1, question 13.

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