Phylum Annelida
اسلاید 1: 08 Sept. 2014Annelida.ppt1www.tabaye.ir
اسلاید 2: 08 Sept. 2014Annelida.ppt2Phylum Annelida“segmented worms”
اسلاید 3: 08 Sept. 2014Annelida.ppt3Phylum AnnelidaPhylum Annelida Latin “ringed” analogy to tree annual rings~ 9000 speciesBody plan Tube-in-tube, Protostomous Bilateral symmetryCoelomate, “split” coelomMarine, aquatic, terrestrial
اسلاید 4: 08 Sept. 2014Annelida.ppt4Phylum AnnelidaTissues and organs differentiated Segmentation highly developedMesodermal “blocks,” each with own coelomSepta between segments
اسلاید 5: 08 Sept. 2014Annelida.ppt5Phylum AnnelidaHydrostatic skeletonFluid pressure in coelom provides support & locomotionCircular musclesLongitudinal musclesPeristaltic locomotion
اسلاید 6: 08 Sept. 2014Annelida.ppt6Function of a hydrostatic skeleton
اسلاید 7: 08 Sept. 2014Annelida.ppt7Phylum AnnelidaSetae (“bristles”) of chitin“anchors” for earthworm“paddles” for polychaeteEnlarged as jaws in leeches, some polychaetes
اسلاید 8: 08 Sept. 2014Annelida.ppt8Animal Life Ways the needs of cells are metFood O2 and CO2 exchange Across epidermis, some have “gills”Waste removalMetanephridia in each segment
اسلاید 9: 08 Sept. 2014Annelida.ppt9Phylum AnnelidaSpecial concerns of a multicellular animalCirculation closed Coordination: Nervous system with paired ventral cords Structural support: Hydrostatic Movement: Hydrostatic Maintenance of water balance: Segmental metanephridia.ReproductionUsually sexual, sexes separate or hermaphroditic
اسلاید 10: 08 Sept. 2014Annelida.ppt10Phylum AnnelidaClosed circulatory systemMultiple “hearts”Hemoglobin not in blood cellsreddish-pink color
اسلاید 11: 08 Sept. 2014Annelida.ppt11Phylum AnnelidaCentral nervous systemDorsal brainPair of nerves on sides of esophagusPaired ventral nerve cords with paired ganglia in each segmentTransverse nerves connect ganglia in each segment
اسلاید 12: 08 Sept. 2014Annelida.ppt12Phylum AnnelidaEarthworms’ paired nerve cords are fused into single ventral cordArthropod better illustrates primitive nervous system of both phyla.
اسلاید 13: 08 Sept. 2014Annelida.ppt13Phylum AnnelidaMetanephridia for excretion of metabolic waste products
اسلاید 14: 08 Sept. 2014Annelida.ppt14Phylum Annelida“Class Polychaeta”Mostly marine, very diverse (polyphyletic ) “many setae,” clusters with 20+ setaeparapodia
اسلاید 15: 08 Sept. 2014Annelida.ppt15Phylum AnnelidaSuperclass ErrantiaMostly marine, diverse active swimmers, predators“many setae,” clusters with 20+ setaeparapodia
اسلاید 16: 08 Sept. 2014Annelida.ppt16Phylum AnnelidaSuperclass SedentariaMostly marine, sedentary tube builders, filter feeders Class (?) marine tube worms Class (?) ClitellataWith clitellum
اسلاید 17: 08 Sept. 2014Annelida.ppt17Phylum AnnelidaClass (?) Clitellata ClitellumAquatic & terrestrial Subclass (?) OligochaetaFew setae in 2-4 clusters per segment
اسلاید 18: 08 Sept. 2014Annelida.ppt18Phylum AnnelidaSubclass (?) Hirudineapair of bladelike “jaws”posterior “suction cup”PredatorsExternal parasites, “bloodsuckers”Secrete anticoagulantsMedicinal use
اسلاید 19: 08 Sept. 2014Annelida.ppt19Phylum AnnelidaClass HirudineaHirudin from leech, Hirudo medicinalis, inhibits blood clottingH. medicinalis, registered as “medical device.”
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