+The **cell membrane** is a fluid, dynamic boundary that encapsulates the [Cell](/wiki/cell), regulating the passage of substances in and out. This delicate, selective barrier protects the [Cytoplasm](/wiki/cytoplasm) and facilitates vital communication with its environment.
+## See also
+- [Lipid Bilayer](/wiki/lipid_bilayer)
+- [Protein](/wiki/protein)
+- [Transport](/wiki/transport)
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