Biology Echinodermata

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Echinodermata

EchinodermataBy: Mustafa Alsaegh, Sable Dalton, & Jamie Lewman

https://s-media-cache-ak0.pinimg.com/236x/5d/5f/d4/5d5fd4fb3d52150d304ff08fb90d94b3.jpgLevel of Classifications Domain: EukaryaKingdom: AnimaliaPhylum: EchinodermataSubphylum: BlastozoaClass: Eocrinoidea, Parablastoidea, Rhombifera, Diploporita, & BlastoideaSubphylum: CrinozoaClass: Crinoidea & ParacrinoideaSubphylum: EchinozoaClass: Echinoidea, Holithuriudea, Edrioasteroidea, Edrioblastoidea, Helicophacoidea, & CyclocystoideaSubphylum: AsterozoaClass: Asteroidea & OphiuroideaSubphylum: HomalozoaClass: Stylophora, Homoiostelea, Homostelea, &CtenocystoideaAbout 6000 different speciesGreek name meaning spiny skin

2Organisms

Asteroidea: The Starfish

https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcR4-SxOxmNRNNu4NWdBMqKQ9mhDIoqP9_sZs91N0_grU_Z0m3aGEchinoidea: The Sea Urchin

http://farm1.staticflickr.com/206/496812354_4275a173db.jpgHolothuroidea: The Sea Cucumber

https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcR1BzRlTZfOpjiM36xW-slqtaOhCZHxPr-mI7ewICLE4cJLRTA2ZAOrganisms Continued

Crinoidea: The Sea-lilies

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Crinoidea: The Feather Star

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Ophiuoidea: The Brittle Star

https://upload.wikimedia.org/wikipedia/en/6/64/Greenbrittlestar.jpgUnifying characteristicsPossess 5-rayed symmetry, mostly radial, sometimes bilateralBody has more than two cell layers, tissues and organsBody cavity is a true coelomMost possesses a through gut with an anusBody shape highly variable, but with no headNervous system includes a circum-oesophageal ringPoorly defined open circulatory systemHas a water vascular system, which hydraulically operates the tube feet or feeding tentaclesWithout excretory organsReproduction normally sexual and gonochoristicFeeds on fine particles in the water, detritus or other animalsAll live in marine environments

Coelom refers to the main body cavity in most multicellular animals and is positioned inside the body to surround and contain the digestive tract and other organs.Circum-oesophageal ring well-developed ring of nerve tissue5Habitat characteristicsLive in Marine habitatOnly found in the OceanMostly on the seafloor

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http://i.ytimg.com/vi/SQeuxGiMRcM/0.jpgFeeding & DigestionThey use their feetThe eat mollusks, worms, and slow-moving animalsThe enzymes help them digest food

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http://1.bp.blogspot.com/-6bW-dBWh_jA.gifSea Stars have a unique digestive system with a mouth at the center of their underside and an anus on their upper surface.Food can be brought into the stomach through the mouth to digest food outside the body.

http://digestivemack.weebly.com/uploads/1/1/5/1/11517135/747003_orig.jpgFood digestion of sea stars

https://www.youtube.com/watch?v=HG17TsgV_qI