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Mollusks and Annelids

Mollusks and Annelids. BIOL 1407. Phylum Mollusca. Chitons Gastropods – snails, slugs Bivalves – clams, oysters, scallops Cephalopods – chambered nautilus, squid, cuttlefish, octopus. Chitons. Gastropods. Video: Click on “Mating Leopard Slugs”

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Mollusks and Annelids

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  1. Mollusks and Annelids BIOL 1407

  2. Phylum Mollusca • Chitons • Gastropods – snails, slugs • Bivalves – clams, oysters, scallops • Cephalopods – chambered nautilus, squid, cuttlefish, octopus

  3. Chitons

  4. Gastropods Video: Click on “Mating Leopard Slugs” http://www.bbc.co.uk/sn/tvradio/programmes/lifeintheundergrowth/video.shtml Photo Credit for Slug: Dr. Stephen Bostic, 2008

  5. Gastropods Photo Credit for Florida Fighting Conch: LA Dawson, 2006, Wikimedia Commons

  6. Bivalves Photo Credit for Giant Clam: Jan Derk, 2002, Wikimedia Commons

  7. Cephalopods Video with Octopus and Cuttlefish: Start at 1:20 minutes http://www.youtube.com/watch?v=zC0zOLqYnRg&feature=related Chambered Nautilus Photo Credit for Octopus: Albert Kok, 2007, Wikimedia Commons

  8. Cephalopods Photo Credit for Flamboyant Cuttlefish: Jenny Huang, 2006, Flickr Photo Credit for Caribbean Reef Squids: Clark Anderson, 2006, Wikimedia Commons

  9. Characteristics of Mollusks • Bilateral symmetry • Triploblastic • Coelomate • Trochophore larva • Photo Credit for Lined Chiton: Kirt L. Onthank, 2007, Wikimedia Commons

  10. Characteristics of Mollusks • Shells (exoskeleton) • Mantle • Visceral Mass • Foot • Photo Credit for Common Snail: Macrophile, 2005, Wikimedia Commons

  11. Characteristics of Mollusks • Radula (many) • Video: http://www.youtube.com/watch?v=BMOSvz5mThM&NR=1 • Video: http://www.teara.govt.nz/EarthSeaAndSky/SeaLife/Shellfish/2/ENZ-Resources/Standard/2/en • Photo Credit for Gray Garden Slug Radula, TM400x: Michal Maňas, 2005, Wikimedia Commons

  12. Characteristics of Mollusks • Complete Digestive System • Circulatory System: open or closed • Gills • Centralized nervous system • Photo Credit for Nudibranch: Jans Petersen, 2006, Wikimedia Commons

  13. Intelligence • Cephalopods • Complex Brains • Excellent Vision • Nervous System controls Chromatophores • Video, Kings of Camouflage: http://www.youtube.com/watch?v=2x-8v1mxpR0 • Photo Credit: Nick Hobgood, 2006, Wikimedia Commons

  14. Centralized Nervous System

  15. Phylum Annelida • Segmented Worms • Oligochaetes – earthworms & relatives • Polychaetes • Leeches

  16. Oligochaetes Photo Credit of earthworm : Michael Linnenbach, 2005, Wikimedia Commons

  17. Polychaetes Photo Credit of Christmas Tree Worms : Nick Hobgood, 2005, Wikimedia Commons

  18. Leeches

  19. Characteristics of Annelids • Bilateral Symmetry • Triploblastic • Coelomate • Segmented • Trochophore larvae • Photo Credit of Tomopteris: Courtesy of uwe kils, 2005, Wikimedia Commons

  20. Annelid Videos • Giant Earthworm Video: http://www.youtube.com/watch?v=DZig6EL5B6A • Leech Video from Science Now: • Short Version (podcast):http://www.youtube.com/watch?v=cKUAroimQrk • Long Version with graphic surgery: http://www.pbs.org/wgbh/nova/sciencenow/0305/01.html • (Warning: bloody pictures)

  21. Incomplete vs. CompleteDigestive Systems

  22. Animal Nutrition • Macronutrients: • Carbohydrates • Lipids • Proteins • Essential Nutrients • Essential Amino Acids • Essential Fatty Acids • Vitamins • Minerals

  23. Transport • Closed Circulatory System • Hearts = Pumps • Blood Vessels = Pipes • Arteries • Capillaries • Veins • Blood = Fluid • Photo Credit: Dr. Stephen Bostic, 2008

  24. Gas Exchange • Gills or Skin Surface • Respiratory Pigments • Hemoglobin; Dissolved in blood (most common) • Chlorocruorin (some polychaetes) • Hemerythrin (some polychaetes) • Photo Credit for Terebellid Polychaete: Matthias Buschmann, 2007, Wikimedia Commons

  25. Excretory System: Metanephridia

  26. Centralized Nervous System

  27. The End Unless otherwise specified, all images in this presentation came from: Campbell, et al. 2008. Biology, 8th ed. Pearson Benjamin Cummings.

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