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Arthropods BIOL 1407.

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Presentation on theme: "Arthropods BIOL 1407."— Presentation transcript:

1 Arthropods BIOL 1407

2

3 Phylum Arthropoda Cheliceriformes Myriapoda: millipedes and centipedes
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 Cheliceriformes: Arachnids
Video: Click on “Trapdoor Spider” and “An Amazing Web”

7 Myriapods Millipede Centipede

8 Photo Credit for Caterpillar: UNK Student, Vieques 2008
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
Photo Credit: Sarefo, 2005 Wikimedia Commons Video: Click on “Dancing Springtails”

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

11 Photo Credit for Artermia: Betsy Maxim, 2008
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: 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: Photo Credit for Monarch Butterfly Pictures: Derek Ramsey, 2006 (adult), 2007 (caterpillar), Wikimedia Commons

22 Photo Credit: André Karwath, 2005, Wikimedia Commons
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 O2 Release CO2 CO2 O2

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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, 8th ed. Pearson Benjamin Cummings.


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