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  2. Membrane - Wikipedia

    en.wikipedia.org/wiki/Membrane

    A membrane is a selective barrier; it allows some things to pass through but stops others. Such things may be molecules, ions, or other small particles.

  3. Cell membrane - Wikipedia

    en.wikipedia.org/wiki/Cell_membrane

    Illustration of a eukaryotic cell membrane Comparison of a eukaryotic vs. a prokaryotic cell membrane. The cell membrane (also known as the plasma membrane or cytoplasmic membrane, and historically referred to as the plasmalemma) is a biological membrane that separates and protects the interior of a cell from the outside environment (the extracellular space).

  4. Biological membrane - Wikipedia

    en.wikipedia.org/wiki/Biological_membrane

    Cross-sectional view of the structures that can be formed by phospholipids in an aqueous solution. A biological membrane, biomembrane or cell membrane is a selectively permeable membrane that separates the interior of a cell from the external environment or creates intracellular compartments by serving as a boundary between one part of the cell and another.

  5. Membrane (disambiguation) - Wikipedia

    en.wikipedia.org/wiki/Membrane_(disambiguation)

    Pterygium, a triangular membrane occurring in eyes; Cell membranes: Plasma membrane, a membrane that separates the interior of all cells from the outside environment; Inner nuclear membrane, the biological membrane of nucleus; Outer membrane (disambiguation), several meanings; Acoustic membrane, a thin vibrating layer that produces sound

  6. Tissue membrane - Wikipedia

    en.wikipedia.org/wiki/Tissue_membrane

    A tissue membrane is a thin layer or sheet of cells that covers the outside of the body (for example, skin), the organs (for example, pericardium), internal passageways that lead to the exterior of the body (for example, mucosa of stomach), and the lining of the moveable joint cavities. There are two basic types of tissue membranes: connective ...

  7. Talk:Cell membrane - Wikipedia

    en.wikipedia.org/wiki/Talk:Cell_membrane

    Plasma membrane is a redirect to this article, and is used later in it - but there isnt any definition - synonyms? Christian75 20:11, 17 July 2011 (UTC) This article is somewhat confusing - cell membranes actually include internal membranes.

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  9. Protoplasm - Wikipedia

    en.wikipedia.org/wiki/Protoplasm

    Protoplasm (/ ˈ p r oʊ t ə ˌ p l æ z əm /; [1] [2] pl. protoplasms) [3] is the part of a cell that is surrounded by a plasma membrane.It is a mixture of small molecules such as ions, monosaccharides, amino acids, and macromolecules such as proteins, polysaccharides, lipids, etc.