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===Meaning===
The '''cell membrane''' is a [[Partially Permeable Membrane|partially permeable membrane]] covering the [[cytoplasm]] of a [[Cell (Biology)|cell]].
===Function===
: The '''cell membrane''' controls which chemicals go in and out of the [[Cell (Biology)|cell]].
===About the Cell Membrane===
: The '''cell membrane''' only allows in certain [[molecule]]s. This means some [[molecule]]s, like [[water]], can diffuse in and out of the [[Cell (Biology)|cell]], however, some cannot pass into the [[Cell (Biology)|cell]].