cell wall definition

  • noun:
    • The rigid outermost cell layer present plants and certain algae, bacteria, and fungi but characteristically absent from pet cells.
    • A thick, relatively rigid, layer formed around specific cells of germs, Archaea, fungi, plants, and algae (however creatures also protists which generally have cell membranes without mobile walls). The cell wall surface is external to the cellular membrane and serves a structural function helping the cell maintain its form and protecting the cellular from damage.
    • a rigid layer of polysaccharides enclosing the membrane of plant and prokaryotic cells; maintains the shape of mobile and functions as a protective buffer

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