CAIE IGCSE Biology 9.3.4 Structure of Arteries and Veins Is Questions
Practise explaining how arterial and venous walls, lumens and valves suit the blood pressures they carry.
- Syllabus
- 2026–2028
- Course
- Biology 0610
Exam points
- link thick muscular elastic artery walls to withstanding, stretching and recoiling under high pressure
- link a relatively narrow arterial lumen to maintaining pressure and a wider venous lumen to low resistance
- explain that veins have valves to prevent backflow because venous pressure is low
