The cell membrane is found in both plant and animal cells. It is the outermost layer in the animal cell and is found just inside the cell wall in the plant cell. The animal cell membrane contains cholesterol, but the plant cell does not. It has pores and is selectively permeable allowing the movement of certain substances into and out of the cell. This helps maintain homeostasis in the cell. The cell membrane also protects and supports the cell.

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Updated June 15, 2000 by: Glen Westbroek
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