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15 Cards in this Set
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- Back
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PHYLUM: CNIDARIA
CLASS: ANTHOZOA SUBCLASS: Zoantheria Examples: stony corals, anemones, zoanthids |
CHARACTERISTICS:
-skeleton, if present (corals) CaCO3 (limestone) -polyps bear numerous nonpinnate tentacles (in multiples of 6) |
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PHYLUM: PLATYHELMINTHES
"flatworms" Examples: planarians, flukes, tapeworms |
BODY STRUCTURE:
--flattened bodies, dorsoventially --3 primary germ layers *ectoderm - epidermis, nervous system *endoderm - lining of gut *mesoderm - msenchyme (filler) reproductive organs, muscles, kidneys BILATERAL SYMMETRY |
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PHYLUM: PLATYHELMINTHES
CLASS: Turbellaria EXAMPLES: Planarians |
CHARACTERISTICS:
-body segmented -without distinct head structure _with protrusible pharynx sand 1,3, or many intestinal branches -ventral surface of body ciliated through life - simple mouth located midventrally on body, a few parasitic forms have suckers - simple epidermis |
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PHYLUM: CNIDARIA
BODY SYSTEMS::::: 1) Integument -neurosensory cells -epidermis (contains epithaeliomuscular cel) -cnidocyte - defensive cells -interstitial cells 2) Skeletal system -corals -e ach polyp secretes a limestone cup around its base -hydroids - colonial creatures (made of chiton) -soft corals 3) Feeding and Digestion - prey on variety of organisms of appropriate size. Starts digestion in gastrovascular cavity 4) Excretion -no specific excretory structures -each cell eliminates its own waste 5) Respiration (gas exchange) -@ cellular level |
6) Circulatory Functions
-no circulation circulatory system -radial canals in medusae serve as nutrient distribution funtions 8) Nervous system -nerve net -sense organs **ocelli - eye spot cluster of photoreceptor cells, measure light intensity |
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PHYLUM: CNIDARIA
CLASS: Scyphozoa Examples: jellyfishes, Aurelia, Cassiopeia |
POLYP:
-relatively small and inconspicuous -mouth leads directly into G-V cavity -G-V cavity a simple chamber -no gonads on polyp -numerous tentacles -asexual budding by strobilization MEDUSA: -numerous radial canals -manubrium with large oral arms -gonads gastroderma NO VELUM |
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PHYLUM: PLATYHELMINTHES
CLASS: MONOGENEA Examples; momogenetic flukes |
CHARACTERISTICS:
-body segmented -without distinct head structure -Pharynx not protrusible; with 2 intestinal branches -only larval stages ciliated -wtih oral sucker and large posterior opisthaptor 9w/hooks and suckers) -epidermis modified intoa tegument, but not used in food absorption |
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Characteristics
PHYLUM: Cnidaria ***Examples: hydras, jellyfishes, anemones, corals |
1) Body consists of 2 cellular layers (epidermis/inner gastrodermis)
2) Radial or biradial symmetry 3) possession of specialized cells (cnidocytes - stingling structures called nematocysts 4) simple or branched gastrovascular cabity 5) Nervous system arranged as a nerve net |
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CNIDARIA LIFE CYCLE |
2 body forms
- Polyp: sessile (attached) form w/tube-like body column and mouth facing upwards **asexually/sexually reproduction - Medusa: free swimming; ** mouth suspended downwards underneath umbrella **sexually-reproducing stage |
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PHYLUM: CNIDARIA
CLASS: ANTHOZOA **Examples: corals, soft corals, anemones |
POLYP:
-lage and conspicuous -mouth leads into tubelike pharynz -G-V cavity partitioned by septa (mesenteries) -gonads presetn on polyp, gastrodermal -6,8, or numerous tentacles -asexual budding lateral MEDUSA: _medusa absent |
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PHYLUM::: PLATYHEWLMINTHES
Life system 1) Integument - simple epidermis 2) skeletal system - NONE 3)Muscular system - paraehymal muscles - diagonal 4) Digestive system *feeding styles 5) Excretory system - protenphridium |
PHYLUM PLATYHELMINTHES
CLASS: Turbellaria Exaples: planarians |
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PHYLUM: PLATYHELMINTHES
CLASS: Cestoda Examles: tapeworms,, Taenia |
CHARACTERISTICS:
-body divided into segments (proglottids) -with head-like structure called a scolex, for attachment to host - NO digestive system --only larval stages in some species ciliated -scolex armed with suckers; no mouth -epidermis modified into absorptive tegument |
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PHYLUM: PLATYHELMINYTHES
CLASS: TREMATODA Exaples: digenetic flukes, Clonorchis, Fasciola |
CHARACTERISTICS:
- body unsegmented - without distinct head structure -pharynx not protrusible, w/2 intestinal branches -only larval stages ciliated -with oral sucker around mouth and simple ventral sucker -epidermis modified into absorptive tegument |
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PHYLUM:: Cnidaria
CLASS: Hydrozoa **Examples--hydras, hydroids, Obelia, Hydra, Chlorohydra, Portuguese man-of-war |
POLYP:
-relatively large and conspicuous -mouth leads directly into G-V cavity -gonads, if present on polyp, epidermal -numerous tentacles -lateral asecual budding MEDUSA: -4 radial canals -manubrium with small oral lobes -gonads epiderman velum present |
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PHYLUM: CNIDARIA
CLASS: ANTHOZOA SUBCLASS: Alcyonaria EXAMPLES: sea fans, sea whips, organ-pipe coral |
CHARACTERISTICS:
-skeleton consists of gorgonin protein + crusty CACO3 -polyps bear 8 pinnate 9feathery) tentacles |
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PHYLUM:: CNIDARIA
CLASS: Cubozoa **Examples: Australian box jelly, sea wasp |
POLYP:
-small and inconspicuous -mouth leads directly into G-V cavity -G-V cavity a simple chamber -no gonads on polyp -polyp transforms into medusa MEDUSA: -4 radial pouches -manubrium with small oral lobes -gonads gastrodermal -4 tentacles VELARIUM PRESENT |
