IB Biology HL 3.2.14 Double Circulation Question Bank
Practise IB Biology HL 3.2.14 by tracing mammalian circulation and comparing pressure and separation in pulmonary and systemic circuits.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Trace red-cell pathways through pulmonary and systemic circuits after oxygen loading.
- Explain how separated double circulation supports pressure control and efficient oxygen delivery.
B3.2.14 (HL)—Single vs. double circulation question 1
The diagrams show blood circulation in a fish and a mammal.
Which two labels represent deoxygenated blood with the lowest pressure in each animal?
A
W and Z
B
X and Y
C
W and Y
D
X and Z
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