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CAIE IGCSE Biology 9.3.2 Functions of Capillaries

Practise explaining how capillary networks connect arteries to veins and exchange substances with body tissues.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • state that capillaries connect the smallest arteries or arterioles with venules and veins
  • explain exchange of oxygen, nutrients and wastes between blood and surrounding tissue fluid
  • identify diffusion rather than osmosis when ions or solutes move between tissue fluid and cells

9.3.2—Functions of capillaries question 1

[Maximum number: 1]

The diagram shows a capillary and some body cells.

Figure for Question 9.3.2—Functions of capillaries question 1 — CAIE IGCSE Biology

How do ions pass from P to Q ?

A

by diffusion in blood

B

by diffusion in tissue fluid

C

by osmosis in blood

D

by osmosis in tissue fluid

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