The sponge corresponds to the skeleton of some “porifera”. It is composed of a soft, very elastic substance, which is really water-absorbing; therefore, sponges are extremely useful for a lot of work that needs to be done in a house. Such sponges can be produced either using natural or synthetic material.

Cellulose is an organic compound as well as the structural component of the primary cell wall of green plants, many forms of algae, and the oomycetes. Cellulose is the most common organic compound on Earth. About 33 percent of all plant matter is cellulose (the cellulose content of cotton is 90 percent and that of wood is 40-50 percent).
For industrial use, cellulose is mainly obtained from wood pulp and cotton. It is mainly used to produce paper.
Cellulose was discovered in 1838 by the French chemist Anselme Payen, who isolated it from plant matter and determined its chemical formula. Cellulose was used to produce the first successful thermoplastic polymer, celluloid, by Hyatt Manufacturing Company in 1870. Hermann Staudinger determined the polymer structure of cellulose in 1920. The compound was first chemically synthesized (without the use of any biologically-derived enzymes) in 1992, by Kobayashi and Shoda.