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CAIE IGCSE Biology 9.3 Blood Vessels

Practise blood-vessel questions on artery, vein and capillary structure, pressure adaptations, diffusion exchange and named vessel routes.

Syllabus
2026–2028
Course
Biology 0610

Exam points

  • identify arteries, veins and capillaries from wall thickness, lumen size and valves
  • link artery, vein or capillary structure to blood pressure, flow or diffusion distance
  • name pulmonary, renal and coronary vessels and state oxygenation where diagrams require it

Covered syllabus points

9.3.1—Structure of arteries, veins9.3.2—Functions of capillaries9.3.3—Main blood vessels9.3.4—Structure of arteries and veins is9.3.5—Structure of capillaries is related9.3.6—Main blood vessels

9.3 Blood vessels 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

9.3 Blood vessels question 2

[Maximum number: 1]

The diagram shows a capillary and some body cells.

Figure for Question 9.3 Blood vessels question 2 — 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

9.3 Blood vessels question 3

[Maximum number: 4]

Question (a)

(a)

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

Fig. 3.1

Fig. 3.1

[ 4 ]

Question (i)

(i)

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

[ 3 ]

Question (ii)

(ii)

State the name of the blood vessel that transports blood from the heart towards the capillaries in the lungs.

[ 1 ]
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