So essentially many of these individual fibers of cellulose can stack on top of one another via hydrogen bonds and that gives it a very high tensile strength. And that's exactly why cellulose is optimal. It's used for providing structure protection as well as support to plant cells. And we'll talk much more about cellulose in future lecture. So we see that polysaccharides are used either to store energy and then convert that into ATP molecules as it happens inside our cells or they can be used in the form or they can be used to give the cell structure and protection as the case is. With cellulose in plant cells now inside our body we do not have enzymes that can break down these beta one four Glycosytic bonds in cellulose.