Phylum- porifera * ( paros - pore , ferre ~TO BEAR) * Commonly called as " spongs ". General characters 1 porifera are all aquatic, mostly marine few terrestrial . 2 The are. Sessile and sedentary & grow like plant. 3. BODY SHAPE : vase or cylinder like . 4 Symmetry: Asymmetrical or radial. 5 The body surface is perpforted .by numerous pores, the ostia through which water entous the body of one or more large opening .the oscula by which the water exist . 6 They consist of outer ectoderm & inner endoderm with an intermediate layer of ,mesenchyme ; therefore diploblastic 7 mouth - absent , Digestion ~ intracellular 8 Excautory & respiration organs are absent 9 contractile vacucles. Are present in some fresh water forms . 10 The sponges are monoecious . Monoecious-‐》 present male and fem...
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