This document discusses the phylum Porifera (sponges). It describes their key characteristics such as lacking organs and mobility. It classifies sponges based on their water canal system and skeletal components. Sponges have an ascon, sycon, or leucon canal type. Their skeleton is composed of calcium carbonate, silicates, or spongin. The document also outlines the roles of sponges, including their economic uses as cleaners or seat fillings and their bioactive compounds that have pharmaceutical applications.

1. KINGDOM ANIMALIA Member of: 1. Fillia Eva (15) 2.Habibul Munna (16) 3.Marshelina NID (20) 4.Nadia Ayu (23) 5.Nurul Millati (26) 6.Roikhatul M (30)

3. The review of animal phylogeny

13. Porifera structure

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