Plant Cells
Plant cell walls serve as a form of protection. In addition, they provide physical support and help in water conservation by allowing water to flow between cells. On the cell wall itself, are pores called plasmodesmata, which allow for cell to cell transport and movement. The cell walls are made of polysaccharides including: cellulose, hemicellulose, cutin, and pectin. However, they can be degraded by cellulase, which is made by bacteria and fungi cells. In young plants, the cells contain primary cell walls that are thin and flexible. As they age, the plant cells develop and form secondary cell walls that causes them to be more rigid. The final cell wall is layered, from the outside in it is: Middle Lamella→Primary Cell Wall→Secondary Cell Wall→Plasma Membrane.