//shewrites.blogspot.in/

Phylum : Porifera 

Example :  sponges

  

    Sponges are simple multicellular aquatic animals. This phylum includes 5000 species. They contain  pores. They are mostly found in marine water and only a few are found in freshwater. Body is usually  cylindrical. The scleroblasts secrets spicules while sponge fibres are secreted by spongioblasts. They feed by filtering small organisms from from water. They cant move and attached to a substrate. Respiration and excretion occur through diffusion with the water current passing through the body.