Combined Science GCSE
Capillaries
What Capillaries means in Combined Science GCSE, as defined for AQA.
Definitions of Capillaries
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Reference: AQA
Vessels that exchange substances, with walls one cell thick and a narrow lumen, giving a large surface area and short diffusion distance.
The smallest blood vessels, forming networks that link arteries to veins and reach almost all body tissues.
Vessels one cell thick that form extensive networks in tissues so substances diffuse over a short distance.
Topics that use Capillaries
- The heart and blood vessels (AQA GCSE)
Related terms
Using Capillaries in the exam
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