Investigating Diffusion

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Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. 

Diffusion is important to organisms because it allows essential chemicals to enter and leave the cell through the cell membrane.

Oxygen, water and glucose all enter cells by diffusion.

Carbon dioxide and water leave the cells by diffusion.

Cell membranes contain tiny pores, which allow water and soluble substances to pass through. Cell membranes act


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