CAIE IGCSE Biology 9.1.3 Double Circulation of a Mammal Questions
Practise tracing pulmonary and systemic circuits and showing that blood passes through the heart twice per complete journey.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- Trace the mammalian blood route: body → heart → lungs → heart → body.
- Define double circulation by naming pulmonary and systemic loops and the two heart passages per circuit.
- Identify oxygenated blood locations in a mammalian double-circulation diagram.
CAIE IGCSE Biology 9.1.3 Double Circulation of a Mammal Questions question 1
Fig. 1.1 is a simplified diagram of the circulatory system in humans.
Fig. 1.1
State the evidence from Fig. 1.1 that the diagram shows a double circulation system.
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