The cell wall is a rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In algae and higher plants, it consists mainly of cellulose.
A complex carbohydrate that forms the main constituent of the cell wall in most plants and is important in the manufacture of numerous products, such as paper, textiles, pharmaceuticals, and explosives.
A carbohydrate whose molecules consist of a number of sugar molecules bonded together; they are an important component in plant's structural building material.