Page 1 :
PHYLUM – COELENTERATA, , 9., , General characters, •, •, •, •, •, •, •, •, •, •, •, •, •, •, •, •, •, •, , These are multicellular animals with tissue and organ system., Most of these animals are marine while few are found in fresh water., These are found in two forms i.e. polyp & medusa., Tubular form or cylindrical form, it is called polyp or hydranth., Umbrella form is called medusa or blast style., The hydranths are nutritive in function called gastrozooids., The medusa are reproductive in function called gonozooids., The body is radially symmetrical and diploblastic., The body having single cup like cavity, it is called coelenterons or gastro vascular cavity., These animals having single opening called mouth but anus is absent., The mouth is surrounded by many tentacles,tentacles having stinging cells or nematoblast, cells; there are an organ of defense and offence., The nervous system is made up of nerve cells., Reproduction occurs by asexual or sexual methods., Asexual reproduction occurs by simple vegetative reproduction by budding while sexual, reproduction occurs by producing male and female gametes., Phylum Coelenterata have been divided in to three classes namely, Class-Hydrozoa, Class –Scyphozoa, Class- Anthozoa, , PHYLUM - COLENTERATA, , CLASS - HYDROZOA, Polyp form is predominant., Gastrovascular cavityis do, not divide., Ex. Obelia, physalia., , CLASS - SCYPHOZOA, Medusa form is, predominant., Gastrovascular cavityis is, divided into 4 chembers., Ex. Aurelia., , CLASS - ANTHOZOA, Only polyp form is present., Gastrovascular cavityis is, divided into many, chembers., Ex. - Metridium,, Tubiphora., .

Page 2 :
10., , Phylum – Coelenterata, 1) Obelia, •, •, •, , •, •, , Kingdom-Animalia, These are eukaryotic, multicellular organism showing heterotrophic mode of nutrition., Sub-kingdom –Metazoa, Because these organisms are multicellular with tissue and organ system., Phylum- Coelenterata, Because this animals having gastro vascular cavity called as coelenteron.Stinging cells are, present and polyp and medusa are also present., Class –Hydrozoa, The gastro vascular cavity is without any fold and polyp form predominant., Type-Obelia, Body is tubular, branched with terminal hydranth., , 2. Physalia, •, •, •, , •, •, , Kingdom-Animalia, These are eukaryotic, multicellular organism showing heterotrophic mode of nutrition., Sub-kingdom –Metazoa, Because these organisms are multicellular with tissue and organ system., Phylum- Coelenterata, Because this animals having gastro vascular cavity called as coelenteron. Stinging cells, are present and polyp and medusa are also present., Class –Hydrozoa, The gastro vascular cavity is without any fold and polyp form predominant., Type – Physalia, It is commonly known as, portuguese man of war.

Page 4 :
11., 3. Aurelia, •, •, •, , •, •, , Kingdom-Animalia, These are eukaryotic, multicellular organism showing heterotrophic mode of nutrition., Sub-kingdom –Metazoa, Because this organisms are multicellular with tissue and organ system., Phylum- Coelenterata, Because this animals having gastro vascular cavity called as coelenterons. Stinging cells are, present and polyp and medusa are also present., Class- Anthozoa, Because gastro vascular cavity divided into many compartment, Type- Aurelia, Commonly known as Jelly fish. Body is umbrella shaped, , 4.Tubipora( Pipe coral), •, •, •, , •, •, , Kingdom-Animalia, These are eukaryotic, multicellular organism showing heterotrophic mode of nutrition., Sub-kingdom –Metazoa, Because this organisms are multicellular with tissue and organ system., Phylum- Coelenterata, Because this animals having gastro vascular cavity called as coelenterons. Stinging cells are, present and polyp and medusa are also present., Class- Anthozoa, Because gastro vascular cavity divided into many compartment, Type –Tubipora, It is commonly known as organ pipe coral.

Page 5 :
., , . Aurelia

Page 6 :
12., 5. Metridium., •, , Kingdom-Animalia, These are eukaryotic, multicellular organism showing heterotrophic mode of nutrition., • Sub-kingdom –Metazoa, Because this organisms are multicellular with tissue and organ system., • Phylum- Coelenterata, Because this animals having gastro vascular cavity called as coelenteron. Stinging cells are present, and polyp and medusa are also present., • Class- Anthozoa, Because gastro vascular cavity divided into many compartment., • Type –Metridium, It is commonly known as sea anemone.