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Capillaries Permeable Walls Substances Exchanged Cells Diffuse

Capillary walls are permeable to allow substances being exchanged with cells to diffuse in and out.

Les parois des capillaires sont perméables pour permettre la diffusion des substances à échanger avec les cellules.

Front Why do capillaries have permeable walls?
Back So the substances being exchanged with the cells can diffuse in and out.

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