IB Biology SL 3.2.5 Vein Adaptations Question Bank
Practise IB Biology SL 3.2.5 by linking thin flexible vein walls, valves and muscle compression to low-pressure blood return.
- Syllabus
- First assessment 2025
- Course
- Biology SL
- Level
- SL
Exam points
- Explain how valves and flexible thin walls keep venous blood moving towards the heart.
- Relate muscle compression and low pressure to one-way venous return.
B3.2.5—Vein adaptations question 1
The structure of part of the digestive system is shown in the diagram below.
Explain how the structure of veins is adapted to their function.
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