Biological membrane

In medicine, microbiology, cellular physiology and biochemistry a membrane is a lipid bilayer that acts as boundary to various cellular structures. Biological membranes define a concealed chemical reaction space, protecting the inside of the enclosed structure from outside influences, as well as protecting the surrounding environment from probably harsh reactions inside the structure (e.g., the membrane of peroxisomes is protecting the cell from peroxides).

See also : cell membrane