INTRODUCTION: Phylum Porifera is the simplest and is considered the most primitive of the multicellular animals. NAME: The word "Porifera" is derived from Latin.Porus means "pore" and ferra means "to bear".So,the Poriferas are pore-bearing animals,commonly called the "sponges". HABITAT: All Poriferas are aquatic.Out of total 5000 species,150 species live in fresh water while all others are marine. SIZE: The Poriferas range in size from few millimeter wide to more than one …showed first 75 words of 709 total…

…showed last 75 words of 709 total…by man mostly for washing and bathing.Although many artificial sponges have been made from synthetic material, still the natural sponges are in demand and is an important industry in many parts of the world. (2)The best commercial sponges are found in the warm waters of Mediterranean Sea. Sponges have great capacity to absorb water.They are used in surgical operations for absorbing fluids and blood. (3)Sponges are also used for sound absorption in buildings.