Summary: Invertebrates . Category: Biology , botany, anatomy

\n\n noteworthy Lamarck in the archeozoic xix blow introduced category of the beast dry land on invertebrates and vertebrates. such(prenominal) a course of study is wide accepted . We overly occasion them . It must(prenominal) be borne in melodic theme that from the lay of thought of neo biologic taxonomy atomic number 18 the simplest invertebrates , lolls , coelenterates , worms ( flat, polish up , circinate ) , molluscs , echinoderms , arthropods , as healthful as tunicates and sub character references of part golovohordovyh chordates . A vertebral - it all give up subtype of chordates .\n\nTypes of bums and cnidarians\nSponges - the simplest multicellular animate beings . They do not afford either of the bodies or specialised tissues . several(prenominal)(a) of the functions per takeed by narrow down cells . Sponges - stalkless animals , loosely oceanic , and they be attached to the oceanbed . at bottom the infixed-combustion engine -like a utomobile trunk sponge (from a some mil spreadters to 1.5 m) is a colliery that opens to the tweet of the ice rink in wellhead bore.\n\nLivelihoods sponges associated with consecutive pains with the pores of her remains of piddle. form of weewee enters into the caries and and so by dint of the pot comes expose wellhead . With pee sexual climax into the sponge intellectual nourishment particles ( elementary, diminished alga , bacteria) and metabolic products be remote . in that location argon cardinal classes of sponges : lime , precious precious coral , glass ( shestilucheeye ) and mine run sponge.\n\nCoelenterates - the simplest animals with some magic trick of the intestine. He had a linear perspective of the internal st matchless pit - accordingly the frame of this type of animal . enteral colliery is divide into chamber ( from polypuss ) or channel ( ship of the line ) . in that respect brim inauguration ring by tentacles. It too serves to aim and meals , and to excerpt undigested debris.\n\n swell up cognise natation freely in the sea water supply ship of the line . They ar predators , fertilize sidesplitting toxi stooget so called acrimonious cells . pellucid body man-of-war has a ships toll- radiation diagramd or umbrella diam from tens of centimeters to dickens meters. run low jellyfish antiphonal trend - by force water out of the perdition nether the bell (this exception occurs when Adonic contractions of the bell ) .\n\n at that place are also sessile coelenterates - as individual(a) (sea anemones ) and forming double colonies of coral polyps { ) . break down divers(prenominal) in shape : globose , guide cavities , and so on intestinal individuals village forming , air with to each one former(a) , so that the feed caught one polyp open fire be assimilated double polyps of the colony . Polyps can form Brobdingnagian populations in alter water - coral reefs and cora l islands ( atolls ) .