Lignin and cellulose are two important components found in the cell walls of plants. Cellulose is a carbohydrate made up of long chains of glucose molecules, providing structural support and strength to plant cells. It is the most abundant organic polymer on Earth and is crucial for the rigidity of plants. Lignin is a complex organic polymer that adds stiffness and resistance to decay in plant cell walls. It is found in higher concentrations in woody plants and helps them withstand environmental stresses. Together, lignin and cellulose contribute to the overall durability and functionality of plant structures.