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Biocam. “Osmosis is the diffusion of water across a selectively permeable membrane from an area of low solute (high water) concentration to an area of high solute (low water) concentration”. This detailed wall chart illustrates the differences in concentrations as well as how cells are effected in different environments. Examples are shown for a typical cell, and red blood cells in hypotonic, isotonic and hypertonic environments, and Elodea cells in a hypotonic and a hypertonic environment. 18” X 24” laminated.