What Is A Sell Wall. A cell wall is an outer layer surrounding certain cells that is outside of the cell membrane. All cells have cell membranes, but generally only plants, fungi the secondary cell wall is a thick layer that is formed on the inside of the primary cell wall.
It helps the cells have their shape.
Fungi cell walls are made of the glucosamine polymer chitin The cell wall is essential to the survival of certain bacteria as it offers protection against some lytic enzymes of host cells. Primary cell walls are comprised mostly of a complex carbohydrate called cellulose. Since the cell wall is the outer most layer present in many cells, it fulfils several functions such as providing structural strength, giving a definite shape to the cell, and.