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Notes week of March 28-April 1

by: Crystal Boutwell

Notes week of March 28-April 1 BIOL 1030

Marketplace > Auburn University > Biology > BIOL 1030 > Notes week of March 28 April 1
Crystal Boutwell
GPA 3.82

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About this Document

These notes cover Ctenophores, Cnidarians and Bilateria.
Organismal Biology
Debbie Folkerts
Class Notes
Organismal Biology, Folkerts, organismal, BIOL 1030, animalia, ctenophores, cnidarians, bilateria
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This 5 page Class Notes was uploaded by Crystal Boutwell on Sunday April 3, 2016. The Class Notes belongs to BIOL 1030 at Auburn University taught by Debbie Folkerts in Fall 2015. Since its upload, it has received 26 views. For similar materials see Organismal Biology in Biology at Auburn University.


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Date Created: 04/03/16
PHYLUM CTENOPHORA CTENES AND COLLOBLASTS; BIRADIAL SYMMETRY Ctenes:8longitudinalrowsoffusedcilia usedfor locomotion andfeeding. Colloblasts:Stickythingsthat help in thecapture ofprey.Foundon tentacles Ctenophoran diversity  200+species  2classes(w/andw/outtentacles)  Mostlyplanktonic PHYLUM CNIDARIA RADIAL SYMMETRY, DIPLOBLASTIC, 2 DEVELOPMENTAL BODY FORMS, “STINGING ANIMALS”-JELLY FISH, ANEMONONES, CORALS, HYDRA Lifecycle:egglarvapolyp(feeding stage) medusa Body parts:  Mesoglea:the layerbetween tissues; containsmainlyproteins; jellylikevs. the mesohylin spongeswhichisamatrix.  Epidermis:fromtheectodermgermlayer  Gastrodermis:fromtheendodermgermlayer o Gastrovascularcavity:performsmanyfunctionslikedigestion,circulation ofnutrients andwastes,dispersalofmatter,skeleton Capable of Medusa Polyp Only capable asexual of sexual reproduction Thick reproduction. Thin mesoglea mesoglea Hypostome Tentacle Manubrium PedalDisc= –“hanging foot down”  Cnidocystes:stinging cells o Nematocytes:the weapon usedtosting o Onlycnidariansgrow cnidocystes. o Eversible:can turn inside out o Cnidocil:trigger hair; stimulation causesoperculumtopop open CLASS HYDROZOA  Budding:formofasexualreproduction; polypforming on bodyofanother  Live solitaryor in colonies  Lifecycle:polyp onlyor polypandmedusa(polyp dominant)  Colonial Polyps o Portuguese man-o-war:entirecolonyofmanyindividualstogether  3reasonsitisnotajellyfish:  Notamedusa  Notin classfor jellyfish  Not“a”anything; colony o Bluebutton:centralbutton o Bythewindsailor:sail  Axialpolyp:verymodifiedpolyp towhichareattachedallother polyps  Gastrozooids:feeding polyp  Polymorphism:manyformsofpolyp  Gonozooids:reproductive polyps(asexual)producemorebybudding  Dactylozooids:stinging polyps; around30min length; asingletentacle attacks preyanddefense. o Craspedacustasowerbyi:freshwater jellyfish(medusa) o Obelialifecycle  Zygote Planulalarvaasexualbuddingmedusabudsmedusa spermproduction zygote  Coenosaic:whatgastrozooidseat,other polypseat.  When a medusa occurs inhydrozoa: o Differentfromothers o Hydromedusae o Vellum:ring likestructureonlyfoundin medusasofhydrozoa CLASS SCYPHOZOA—TRUE JELLYFISH  Medusapredominate  Largestofallcnidarians  Containsagastricpouchfor agastrovascularcavity,interconnecting canalsandagonad.  Lifecycle: o Medusagametesplanulascyphistoma(feeding polyp) young strobili strobiliyoung medusa(ephyra) medusa  Longitudinal(stacked)budding formsa strobili  Ephyra:growsup tobe amedusa  Cyaneagigantean—giantjellyfish,upside down jellyfish,algae in manubrium,thimble jellies, andstalkedjellies:medusaremain attachedtopolyp. CLASS CUBOZOA—BOXED JELLYFISH—CUBE MEDUSAS Ex:Chironexfleckers—seawasp; can killyou in seconds CLASS ANTHOZOAA—ANEMONES AND CORALS  Polyponly  Radialsymmetry  Looklikeplants  Septalfilaments:armedwith cnidocytes,run longitudinalfrommounttopedaldisc  Acontiathreads  Cnidocytes  Large polypswith septadividing gastrovascularc.  Solitary corals o Fungia sp.—solitarycoral,mushroomcoral o Calcareous skeleton—corrallite  Colonial coralshave acenosome; areabetween polyps  Soft corals:gorgonians  Stony corals:coral reef =habitat for 95% ofthe ocean BILATERIA PHYLUM PLATYHELMINTHES—FLAT WORMS  Triploblastic,acoelomate,protostome,organs,organsystem LOPHOTROCHOZOANS  2common characteristics o Lophophores:feedingstructurewith tentaclesfor filter feeding or o Trochophore:adistinctlarvalstage  Flattominimizedistance  Locomotion: o Glidingin wateror mucustrail o Theworm“squiggle”causedbycontraction ofcircularandlongitudinalmuscles  Digestive system o Gastrovascular cavity o Pharynx  Excretorysystem o Simple o Osmoregulation o Purpose:getting ridoftoxins/waste o Protonephridia:flame cells,ducts,nephridroporesledtoexoretum  Nervoussystem o Ganglia:cluster ofnerve cells o Cords,sensorystructures  Ocellus:eye structures  Auricles:ears  Regeneration o Requirestotipotent cells  Neoblastsaggregate atwoundsite andcreate ablastemal  Reproductive system o Mostlymonoecious  FEMALE  Ovary  Oviduct  Ovipore  MALE  Penis  Testes  Gonads CLASS TURBELLARIA Allfreeliving worms Planarians CLASS TREMATODA—FLUKES  Onlyparasites  Veryprolific:have lotsofbabies  Complexlifecycles  Verylittlenervoussystem/excretorysystem o Ex:clonorchissinensis:human liverfluke  Lifecycle:eggexitshumanin feces miracidiaeaten bysnailsporocystcapable ofmultiple fission rediaecerariae encystedin skin offleshoffishmeacercariaingestedbyhumans  Hosts:human,snail,fish CLASS CESTODA—TAPEWORMS  Allparasitesin gutofvertebrate hosts  Bodytype:scolex (attachedparts) andstrobili(chainofbuds) o Microtriche:tinyhair like foldingon surface absorbsnutrientsthrough the skin o Proglottids:young budsnearthescolex; olderbudsnearother end o Gravidproglottids:packagesofeggsreleasedfornexthosttofind o Ex:beeftapewormtaeniasaginata o Lifecycle:humanseat undercookedinfectedmeat gravidprogattidspassintofeces fecesgoesintocow pastures cattleandpigsbecome infecteddevelopin muscleshumanseatthemuscles  2hosts,human,cow


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