Source:http://linkedlifedata.com/resource/umls/id/C0007623
MSH: The outermost layer of a cell in most PLANTS; BACTERIA; FUNGI; and ALGAE. The cell wall is usually a rigid structure that lies external to the CELL MEMBRANE, and provides a protective barrier against physical or chemical agents.,CSP: in most algae, bacteria, and fungi, the structure which forms a (usually rigid) layer external to the cell membrane; responsible for the shape of the organism and for protecting it from mechanical damage, osmotic lysis, etc; may also serve as a permeability barrier to antibiotics and other substances.,GO: The rigid or semi-rigid envelope lying outside the cell membrane of plant, fungal, and most prokaryotic cells, maintaining their shape and protecting them from osmotic lysis. In plants it is made of cellulose and, often, lignin; in fungi it is composed largely of polysaccharides; in bacteria it is composed of peptidoglycan. [ISBN:0198547684]