#cell_wall__cell_membrane__plasma_membrane  a thin membrane around the cytoplasm of a cell; controls passage of substances in and out of the cell
  supertype:  #semipermeable_membrane__semipermeablemembrane  a membrane (as a cell membrane) that allows some molecule to pass through but not others
  part of:  #cell  the basic structural and functional unit of all organisms; cells may exist as independent units of life (as in monads) or may form colonies or tissues as in higher plants and animals
     part of:  #living_thing__organism__being  a living (or once living) entity that has (or can develop) the ability to act or function independently

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