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Arthropods BIOL 1407. Phylum Arthropoda Cheliceriformes –Horseshoe Crabs –Arachnids: spiders, scorpions, ticks, mites Myriapoda: millipedes and centipedes.

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Presentation on theme: "Arthropods BIOL 1407. Phylum Arthropoda Cheliceriformes –Horseshoe Crabs –Arachnids: spiders, scorpions, ticks, mites Myriapoda: millipedes and centipedes."— Presentation transcript:

1 Arthropods BIOL 1407

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3 Phylum Arthropoda Cheliceriformes –Horseshoe Crabs –Arachnids: spiders, scorpions, ticks, mites Myriapoda: millipedes and centipedes Hexapoda: insects and springtails Crustacea: crabs, lobsters, barnacles, etc.

4 Cheliceriformes: Horseshoe Crabs

5 Cheliceriformes: Arachnids

6 Video: Click on Trapdoor Spider and An Amazing Web

7 Myriapods Millipede Centipede

8 Hexapods: Insects Photo Credit for Caterpillar: UNK Student, Vieques 2008 Videos: Click on Titan Beetle, Moth and Lantern Bug, Feather-Legged Bug, Bot Flies, Giant Asiatic Honeybees, and Mangrove Ants.

9 Hexapods: Springtails Video: Click on Dancing Springtails Photo Credit: Sarefo, 2005 Wikimedia Commons

10 Crustaceans Photo Credit for Spiny Lobster: UNK Student, 2008, Vieques

11 Crustaceans Photo Credit for Artermia: Betsy Maxim, 2008

12 Characteristics of Arthropods Bilateral symmetry Triploblastic Coelomate Photo Credit: Alvesgaspar, 2008, Wikimedia Commons

13 Characteristics of Arthropods Segmentation Chitinous Exoskeleton Photo Credit for Striped Love Beetle: Adrian Pingstone, 2005, Wikimedia Commons

14 Characteristics of Arthropods Jointed Appendages Photo Credit for Praying Mantis in Defense Posture: Tibor Duliskovich, 2007, Wikimedia Commons

15 Characteristics of Arthropods Ecdysis Video of Cicada Nymph Molting: =go4MqVq9HVM =go4MqVq9HVM Photo Credit: Macau500, 2004, Wikimedia Commons

16 Characteristics of Arthropods Complete Digestive System Open Circulatory System Gills or book lungs or tracheal tubes Centralized nervous system

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19 Metamorphosis Developmental stage in insects Young feeding form adult reproductive form

20 Incomplete Metamorphosis Young resemble adults Smaller with different proportions Photo Credit for Eurydema oleraceum nymph: James K. Lindsey, 2007, Wikimedia Commons Photo Credit for Eurydema oleraceum adult: Guido Gerding, 2006, Wikimedia Commons

21 Complete Metamorphosis Larval stages do not resemble adults Pupa stage transformation Video: GTUgUEpqBrA&feature=related GTUgUEpqBrA&feature=related Photo Credit for Monarch Butterfly Pictures: Derek Ramsey, 2006 (adult), 2007 (caterpillar), Wikimedia Commons

22 Wings Photo Credit: André Karwath, 2005, Wikimedia Commons

23 Complete Digestive System

24 Transport Open Circulatory System Heart = Pump Vessels Hemolymph = Fluid

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26 Gas Exchange Gills Book Lungs Tracheal Tubes Respiratory Pigments –Hemocyanin (crustaceans and horseshoe crabs) –Photo Credit for Terebellid Polychaete: Matthias Buschmann, 2007, Wikimedia Commons

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28 Cellular Respiration Food is needed to provide fuel for cellular respiration Cellular respiration: –ATP –Use O 2 –Release CO 2 CO 2 O2O2

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30 Surface-Area-to-Volume As body size, Surface Area increases more slowly than Volume increases Large bodies have smaller surface-area-to- volume ratio than small bodies

31 Surface-Area-to-Volume Exchange occurs across surfaces Dependent upon surface area Folding Surface Area

32 Surface-Area-to-Volume Volume determines demand for: –Materials –Energy –Oxygen Volume generates: –Metabolic Wastes –Carbon Dioxide

33 Advantage of Folding Folding of internal structures increases surface area Exchange rate can meet demands of organism

34 Arthropod Excretory Systems: Antennal Glands and Malpighian Tubules

35 Centralized Nervous System

36 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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