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Diversity of Animals

Diversity of Animals. 1. Simple Animals a) Phylum Porifera. CHARACTERISTICS: No true tissues sessile (stay fixed in one place) asymmetrical, lack cell layers oscula (large openings that expel water) hermaphroditic (reproduce sexually & asexually). “Commercial Sponge”

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Diversity of Animals

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  1. Diversity of Animals • 1. Simple Animals • a) Phylum Porifera • CHARACTERISTICS: • No true tissues • sessile (stay fixed in one place) • asymmetrical, lack cell layers • oscula (large openings that expel water) • hermaphroditic (reproduce sexually & asexually) “Commercial Sponge” http://www.middleschoolscience.com/spong.jpg

  2. Diversity of Animals • 1. Simple Animals • b) Phylum Cnidaria • CHARACTERISTICS: • cells organized into true tissues • radial symmetry (Fig. 14.5) • nerve net allows response to external stimuli • stinging structures on tentacles • asexual “Jellyfish” http://www.pinktentacle.com/images/jellyfish_invasion.jpg “Sea Anemone” http://www.valdosta.edu/~jlgoble/Sea%20Anemone%20Diadumene%20Dia%2030cm%201.JPG

  3. Diversity of Animals 2. Worm-Like Animals a) Phylum Platyhelminthes (“flatworms”) • CHARACTERISTICS: • - true tissue • Bilateral symmetry (two halves of animal are mirror images, Fig. 14.11) • no body cavity (flat bodies) “Marine Flatworm” http://www.waterworxbali.com/Images/Photos/Large/pseudoceros-ferrugineus.jpg “Tapeworm” http://www.dkimages.com/discover/previews/887/45066290.JPG

  4. Diversity of Animals • Worm-Like Animals • b) Phylum Nematoda • CHARACTERISTICS: • True tissue • bilateral symmetry • has a body cavity • pseudocoelom (body cavity only partially lined with mesoderm) “Roundworm” http://www.dkimages.com/discover/previews/968/5001804.JPG

  5. Diversity of Animals • Worm-Like Animals • c) Phylum Annelida • (“segemented worms”) • CHARACTERISTICS: • True tissue • Bilateral symmetry • Body cavity • True coelom • Protosome (coelom from mesoderm cells mass) • Segmented body (allow increase in body size & movement) • no jointed appendages • hermaphroditic “Earthworm” http://www.wildlifetrust.org.uk/cheshire/IMAGES/watch_earthworm.jpg “Leech” http://www.sciencefriday.com/news/041907/leech.jpg

  6. Diversity of Animals • Invertebrates • a) Phylum Mollusca • (“animals with a shell”) • CHARACTERISTICS: • True tissue • Bilateral symmetry • Body cavity • True coelom • Protosome • no segmentation “Land Snail” http://www.naturephoto-cz.com/photos/others/copse-snail-25279.jpg

  7. Diversity of Animals • Invertebrates • b) Phylum Echinodermata • CHARACTERISTICS: • True tissue • Bilateral symmetry • Body cavity • True Coelom • Deuterosome (coelom from endoderm lining) • No backbone “Starfish” http://animals.nationalgeographic.com/staticfiles/NGS/Shared/StaticFiles/animals/images/primary/starfish.jpg “Sea Urchin” http://www.iayork.com/Images/2007/9-3-07/Urchin.png

  8. Diversity of Animals • Joint-Legged Animals • a) Phylum Arthropoda I. Crustaceans • (“animals w/ an exoskeleton”) • CHARACTERISTICS • - True tissue • Bilateral symmetry • Body cavity • True coelom • Protosome • Segmentation • Jointed appendages “Crayfish” http://www.biol.andrews.edu/everglades/organisms/Invertebrates/Arthropoda/Pond%20Crayfish/pond_crayfish-main.jpg

  9. Diversity of Animals • Joint-Legged Animals • a) Phylum ArthropodaII. Arachnids “Garden Spider” http://entomology.unl.edu/images/spiders/argiope_aur2.jpg

  10. Diversity of Animals • Joint-Legged Animals • a) Phylum Arthropoda III. Insects “Grasshopper” http://citybugs.tamu.edu/images/grasshopper%20differential.jpg “Monarch Butterfly” http://www.richard-seaman.com/Arthropods/Usa/Butterflies/Illinois/ViceroyInDaisyPatch.jpg

  11. Diversity of Animals • Internal Skeletons • a) Ancestral Chordates “Lancelet” http://images.google.ca/images?gbv=2&svnum=10&hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&q=lancelet&btnG=Search+Images “Tunicates” http://wwwchem.uwimona.edu.jm:1104/gifs/tunicate.jpg

  12. Diversity of Animals • Internal Skeletons • b) Phylum Chordata • CHARACTERISTICS: • True tissue • Bilateral symmetry • True coelom • Deuterosome • Backbone “Frog” http://www.naturephoto-cz.com/photos/others/common-tree-frog-9282.jpg “Mouse” http://www.doyourownpestcontrol.com/house_mouse_uc.jpg

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