The primary component of plant cell walls is cellulose. Cellulose is a complex carbohydrate, or polysaccharide, composed of long chains of glucose molecules linked together by β(1→4) glycosidic bonds. It provides structural support to the plant, enabling them to maintain rigidity and withstand various environmental pressures. Cellulose is not digestible by most animals, but it plays a crucial role in forming dietary fiber, which is important for digestive health in herbivores and humans. Additionally, cellulose contributes to the overall strength and protection of plant tissues, making it essential for plant growth and development.