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Lignocellulose is the substance that trees are made of. The word stands for the two main components, lignin and cellulose. When lignin is stored in the cell wall of plants, it is called "lignification". The lignin is stored between the glucose units of the cellulose, which results in the formation of lignocellulose and thus the formation of wood. Lignocellulose is very important for large trees, because without the supporting wood they would snap like a blade of grass. In addition, the tree would die of dehydration, because the lignified cells serve as a water pipe system that reaches all the way up to the treetop.