ConceptConceptDocsDocuments

CAIE IGCSE Biology 9.3.5 Capillary Adaptations for Exchange

Practise linking one-cell-thick walls, narrow lumens and extensive networks to efficient capillary exchange.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • link a wall one cell thick to a short diffusion path between blood and tissue fluid
  • explain that a narrow lumen keeps blood close to the wall and slows cells for exchange
  • link branching networks to a large area and close contact with cells throughout tissues

9.3.5—Structure of capillaries is related question 1

[Maximum number: 3]

Fig. 3.1 is a diagram of alveoli and associated blood vessels.

Fig. 3.1

Fig. 3.1

Explain how the structure of a capillary is related to its function.

All question bank results loaded