Cell wall of plant cells is formed of

The cell wall of plant cells is mainly formed of cellulose which is a carbohydrate polymer. Cellulose molecules form strong fibers that give rigidity and support to the plant cell. The cell wall not only provides structure but also protects cells against mechanical stress and pathogens. It also helps regulate water intake and prevents excessive expansion of cells. In addition to cellulose plant cell walls may contain hemicellulose and lignin depending on the plant type. Humans cannot digest cellulose but it is important in the diet as dietary fiber. Cellulose is also widely used in paper textile and biofuel industries.