The phylum porifera consists of sponges. Porifera is the latin name that came from the pores on the surface of the sponges.
All types of sponges have the same excretory system. The sponges' cells absorb oxygen by diffusion from the water flow system, into which carbon dioxide and other soluble waste products such as ammonia also diffuse. Archeocytes remove mineral particles that threaten to block the ostia, transport them through the mesohyl and generally dump them into the outgoing water current, although some species incorporate them into their skeletons.