CAIE IGCSE Biology 9.3.1 Artery, Vein & Capillary Structure
Practise comparing blood vessels by wall thickness, lumen diameter and the presence of valves.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- identify arteries by thick walls and relatively narrow lumens
- identify veins by wider lumens and valves that prevent backflow
- identify capillaries by one-cell-thick walls suited to short diffusion distance
9.3.1—Structure of arteries, veins question 1
[Maximum number: 1]
What is a feature of veins?
A
one-cell-thick wall
B
narrow lumen
C
thick muscular walls
D
valves are present
D
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