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Animal Diversity: Invertebrates Chapter 25

Animal Diversity: Invertebrates Chapter 25. Sponges . Jelly fish. Mussels. Worms . Coral . Insects . What makes an animal an animal?. What are the evolutionary milestones that led to bodies of modern animals?. Tissue Formation. Formation of a three-layer animal embryo.

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Animal Diversity: Invertebrates Chapter 25

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  1. Animal Diversity:InvertebratesChapter 25

  2. Sponges Jelly fish Mussels Worms Coral Insects

  3. What makes an animal an animal?

  4. What are the evolutionary milestones that led to bodies of modern animals?

  5. Tissue Formation • Formation of a three-layer animal embryo • Formation of a three-layer animal embryo

  6. Body Symmetry

  7. Gut and Body Cavities

  8. Bilateral organisms develop in one of two ways • Protostome • Deuterostome • Both represent distinct evolutionary groups within bilateral animals

  9. Circulation

  10. Segmentation Understanding Evolution. 2011. http://evolution.berkeley.edu/evolibrary/article//arthropods_05 AbsoluteAstronomy. 2011. http://www.absoluteastronomy.com/topics/Segmentation_(biology)

  11. Choanoflagellates Carroll, Sean B. 2010. http://www.nytimes.com/2010/12/14/science/14creatures.html?_r=1 Science Notes. 2008. New York Times. http://sciencenotes.wordpress.com/2008/03/06/choanoflagellates-to-sponges-to-metazoa/ Devitt, Terry. 2001. University of Wisconsin-Madison News. http://www.news.wisc.edu/6920

  12. Choanoflagellates

  13. Relationships and Classification

  14. The Simplest Living Animal • Placozoans, the simplest known animals, have no body symmetry, no tissues, and just four different types of cells • Example: Trichoplax adherens

  15. Phylum Porifera - Sponges • Only animal to lack tissues • Individual cells have specialized functions but do not act as a specialized group of cells or tissue • Suggests that the evolutionary split between sponges and all other animals occurred early • Ancient common ancestor gave rise to both sponges and tissue containing animals

  16. 2 Major Categories of Animals • Vertebrates (vertebral column) • Invertebrates (no vertebral column)

  17. Major Invertebrate Phyla • Porifera • Cnidaria • Platyhelminthes • Nematoda • Rotifera • Annelida • Mollusca • Arthropoda • Echinodermata

  18. Sponges – Phylum Porifera

  19. Sponge Body Plan

  20. Phylum Cnidaria Hydrozoan Jellyfish Sea anemone Corals

  21. Two Cnidarian Body Plans

  22. Cnidarian Diversity

  23. Flatworms – Phylum Platyhelminthes

  24. Phylum Platyhelminthes –Schistosoma – Blood Fluke

  25. Phylum Platyhelminthes - Tapeworm

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