Diffusion

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6 Terms

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Definition of diffusion

The movement of particles from an area of high concentration to an area of low concentration.

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Examples of diffusion in the body

Oxygen diffusing into blood in lungs, carbon dioxide diffusing out.

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Factors affecting rate of diffusion

Concentration gradient, temperature, surface area.

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Adaptations to maximise diffusion

Large surface areas (e.g., alveoli), thin barriers (one cell thick), good blood supply.

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