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‘This pathway of water transport is helpful in food gathering, respiratory exchange and, removal of waste., , Special cells ~ Choanocytes or collar cells line the spongocoel and the canals. These cells, are flagellated., , Digestion ~ Intracellular., , Skeleton ~ Made up of spicules or sponging fibres., , Reproduction Bisexual or hermaphrodite animals., , Sponges reproduce asexually (fragmentation) and sexually., , Fertilisation — Internal, Development ~ Indirect having a larval stage which is morphologically distinct from the, adult., , Examples: Sycon (Scypha), Spongilla (Fresh water sponge) and Euspongia (Bath sponge)., , Phylum — Coelenterata (Cnidaria), , Habitat — Aquatic, mostly marine, sessile or free-swimming,, Symmetry ~ Radially symmetrical., , Special cells — cnidoblasts or cnidocytes (which contain the stinging capsules or, nematocytes) present on the tentacles and the body., , Cnidoblasts are used for anchorage, defense and for the capture of prey., , Level of organization — tissue level of organisation and diploblastic., , Body Cavity ~ Absent, central gastro-vascular cavity present with a single, opening, hypostome., , Digestion — both extracellular and intracellular.