Mollusks and Annelids BIOL 1407. Phylum Mollusca Chitons Gastropods – snails, slugs Bivalves – clams, oysters, scallops Cephalopods – chambered nautilus,

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Presentation transcript:

Mollusks and Annelids BIOL 1407

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

Chitons

Gastropods Photo Credit for Slug: Dr. Stephen Bostic, 2008 Video: Click on “Mating Leopard Slugs” /lifeintheundergrowth/video.shtml

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

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

Cephalopods Video with Octopus and Cuttlefish: Start at 1:20 minutes Chambered Nautilus Photo Credit for Octopus: Albert Kok, 2007, Wikimedia Commons

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

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

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

Characteristics of Mollusks Radula (many) Video: MOSvz5mThM&NR=1 MOSvz5mThM&NR=1 Video: ndSky/SeaLife/Shellfish/2/ENZ- Resources/Standard/2/en ndSky/SeaLife/Shellfish/2/ENZ- Resources/Standard/2/en Photo Credit for Gray Garden Slug Radula, TM400x: Michal Maňas, 2005, Wikimedia Commons

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

Intelligence Cephalopods –Complex Brains –Excellent Vision –Nervous System controls Chromatophores –Video, Kings of Camouflage: x-8v1mxpR0 x-8v1mxpR0 Photo Credit: Nick Hobgood, 2006, Wikimedia Commons

Centralized Nervous System

Phylum Annelida Segmented Worms Oligochaetes – earthworms & relatives Polychaetes Leeches

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

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

Leeches

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

Annelid Videos Giant Earthworm Video: Leech Video from Science Now: –Short Version (podcast): –Long Version with graphic surgery: (Warning: bloody pictures)

Incomplete vs. Complete Digestive Systems

Animal Nutrition Macronutrients: –Carbohydrates –Lipids –Proteins Essential Nutrients –Essential Amino Acids –Essential Fatty Acids –Vitamins –Minerals

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

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

Excretory System: Metanephridia

Centralized Nervous System

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

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