![]() The primary cell wall gives the cell the strength and flexibility it requires to grow. It is mostly made up of cellulose microfibrils that are held together by a gel-like matrix of hemicellulose fibres and pectin polysaccharides. Primary cell wall: This layer develops between the middle lamella and the plasma membrane in developing plant cells. ![]() Pectins aid in cell adhesion by allowing adjacent cell walls to bind to one another. Middle lamella: This outer cell wall layer comprises polysaccharides known as pectins. While every plant cell has a middle lamella and a primary cell wall, not every cell has a secondary cell wall. These layers are identified as the middle lamella, primary cell wall, and secondary cell wall, beginning with the outermost layer of the cell wall. Plant cell walls are multi-layered and can have up to three sections. It also enables cells to create turgor pressure, or the pressure of cell contents against the cell wall. The cell wall of plant cells covers the plasma membrane and offers tensile strength and resistance to mechanical and osmotic stress. The three layers are the middle lamella, primary cell wall, and secondary cell walls. In many plants, the cell wall is composed primarily of cellulose and has three layers. The cell wall’s primary functions are to provide structure, support, and protection to the cell.
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