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Sıra	DOSYA ADI	Format	Bağlantı
01.	Riedell Images Earthworm Blood	ppt	Sunumu İndir Sunuyu İndir Sunumu İndir

Transkript

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WORM DISSECTION

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KIDSPIRATION by Riedell

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CLASSIFICATIONKingdom: Phylum: Class:ANIMALIAAnnelida“little rings”OLIGOCHAETA “few bristles”

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SETA (plural: setae)http://www.pgjr.alpine.k12.ut.us/science/whitaker/Animal_Kingdom/Earthworm/Earthworm.htmlBRISTLES on VENTRAL surface

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SETAE- Provide tractionhttp://www.dof.virginia.gov/images/anim-worm-crawl.gifhttp://www.greatbluemarble.com/robin_pulling_worm_ground_md_wht.gif

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SegmentationCompartments allow individual parts to move independently Damage insurance If one section is damaged, others can still functionhttp://sps.k12.ar.us/massengale/earthworm_dissection.htmBIODIDAC

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Cartoon by:Gary Larson

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EXTERNAL STRUCTURESPROSTOMIUM

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EXTERNAL STRUCTURESDORSAL BLOOD VESSELCAMOUFLAGEhttp://biog-101-104.bio.cornell.edu/BioG101-104/tutorials/animals/earthworm.html

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CUTICLE(non-cellular protective layer)http://www.flushing.k12.mi.us/srhigh/tippettl/biology/lum/cuticle.htmlhttp://www.flushing.k12.mi.us/srhigh/tippettl/biology/lum/cuticle.html

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RESPIRATORYNo respiratory organsSkin must stay moist for gas exchangeGlands produce mucoushttp://www.wildlifetrust.org.uk/cheshire/IMAGES/watch_earthworm.jpg

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SURVIVING HOT DRY CONDITIONSWorms tunnel deeper into the soilRoll into a ballCover themselves with mucousSlow their body functions down“Suspended animation” = ESTIVATIONWait for conditions to improvehttp://www.backyardnature.net/earthwrm.htm

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SEXUAL REPRODUCTION Earthworms are hermaphrodites HAVE BOTH MALE & FEMALE REPRODUCTIVE ORGANS in same worm

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SEXUAL REPRODUCTIONOVARIES – make eggsTESTES- make sperm

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EXTERNAL STRUCTURESMALE GENITAL PORE- releases sperm to give awayFEMALE GENITAL PORE- releases eggsOPENINGS to SEMINAL RECEPTACLES- receive sperm from other worms when tradehttp://sps.k12.ar.us/massengale/earthworm_dissection.htm

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SEXUAL REPRODUCTIONEarthworms are HERMAPHRODITES BUT. . . DON’T fertilize themselves!http://upload.wikimedia.org/wikipedia/commons/f/f6/Mating_earthworms.jpg

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SEXUAL REPRODUCTIONEXTERNAL FERTILIZATIONProduce COCOONSmade of MUCOUSand CHITIN(tough carbohydrate)

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Animated images from: http://www.urbanext.uiuc.edu/worms/anatomy/anatomy5.htmlDIRECT DEVELOPMENThttp://blogs.salon.com/0003248/images/worm_cocoons.jpgEarthworms produce between 4 - 70 cocoons per year. Each cocoon may contain 2-20 embryos. Baby worms hatch after a few weeks

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LOOK INSIDE

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INTERNAL STRUCTURESEUCOELOMATES “true” coelomhttp://www.biologie.uni-hamburg.de/b-online/library/onlinebio/annelidbodyxs.gifhttp://www.lander.edu/RSFOX/310images/310bilatImage.html

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SKELETAL “hydrostatic skeleton”Fluid in coelom protects organsand provides supporthttp://www.wildlifetrust.org.uk/cheshire/IMAGES/watch_earthworm.jpghttp://blog.tricerion.com/wp-content/uploads/2010/01/balloon.jpg

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EXCRETORY SYSTEMNEPHRIDIUMpl. NEPHRIDIAEXCRETORY TUBULEShttp://www.pleasanton.k12.ca.us/avhsweb/thiel/apbio/review/excretory.htmlCollect & excreteNITROGEN WASTEOsmoregulation

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INTERNAL STRUCTUREShttp://kentsimmons.uwinnipeg.ca/16cm05/16labman05/lb6pg3_files/wormnephridia.jpg

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CLOSED circulatory systemDORSAL BLOOD VESSELVENTRAL BLOOD VESSEL

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Image from: http://www.urbanext.uiuc.edu/worms/anatomy/anatomy6.html

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INTERNAL STRUCTUREShttp://sps.k12.ar.us/massengale/earthworm_dissection.htm

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INTESTINE- absorbs nutrientsADAPTATIONS for getting nutrients out of SOIL 1. REALLY LONG INTESTINE- so food spends long time passing through 2. TYPHLOSOLE- ridge inside increases surface area for more absorptionImages by Riedell/Vanderwal ©2005

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TYPHLOSOLE Ridge inside intestine increases surface area so more nutrients are absorbed http://www.uleth.ca/bio/bio1020/images/worm2.jpg

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Decompose organic matter(dead leaves, animal waste, etc)Return nutrients to soil Burrowing allows air and water to penetrate to rootsTunnels loosen soil so roots can grow more easilyEarthworms play an important role in soil fertility“intestines of the earth” ~ Aristotlehttp://www.semioticon.com/seo/N/images/niche_3.png\...it may be doubted if there are any other animals which have played such an important part in the history of the world as these lowly organized creatures.\ ~ Charles Darwin

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REMEMBER embryo orientation is flipped in vertebrates and invertebrates! Images modified from: http://io.uwinnipeg.ca/~simmons/16cm05/1116/16anim3.htm

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Most INVERTEBRATES have a DORSAL HEART & a VENTRAL NERVE CORDALL VERTEBRATES have a DORSAL NERVE CORD & a VENTRAL HEART.BODY PLANS are also flipped!

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GANGLIA= nerve centerIf in located in head and acting as “brain” = CEREBRAL GANGLIAhttp://biog-101-104.bio.cornell.edu/BioG101-104/tutorials/animals/earthworm.html

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MUSCULAR SYSTEMImage from: http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20102/Bio%20102%20lectures/Animal%20Diversity/Protostomes/mollusks.htm#Chelicerates%20(subphylum%20Chelicerata

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Image from: http://www.urbanext.uiuc.edu/worms/anatomy/anatomy8.html