Capillaries 0.0 / 5 ? BiologyCells, tissues and organsGCSEAQA Created by: EmmaCreated on: 08-05-13 18:12 What do capillaries branch from? Arteries 1 of 6 Are capillaries small and large? Small 2 of 6 What do capillaries do? They carry blood really close to every cell in the body to exchange substances with them 3 of 6 What are the walls like? They are permeable, so substances can diffuse in and out 4 of 6 What do capillaries supply? They supply food and oxygen, and take away waste like CO2 5 of 6 How thick are the walls? They are usually only one cell thick as it increases the rate of diffusion by decreasing the distance over which it occurs 6 of 6
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