4-02 Notes

4-02 Notes - Oysters o Cephalopods: Octopi (large eyes,...

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Notes 4-2-08 Figure 17.19; crawfish; great example of arthropod o Exoskeleton made of chitin o Most abundant group on planet o Highly specialized areas (pinchers in case of crawfish) Allow for a lot of flexibility o 2 body sections: Cephalothoraxes (from mouthparts to thorax) and abdomen (from thorax to right before tail) 4 groups of arthropods o Insects o Arachnids o Crustaceans o Centipedes/Millipedes Over a million named species; most in insect group For every 1 person: 150000000 arthropods Oldest arthropods found 4mya Insects good at walking and flying Metamorphosis Figure 17.20 Phylum Mollusca o Gastropod- lives in shells (snails) o
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Unformatted text preview: Oysters o Cephalopods: Octopi (large eyes, large brains) Phylum Echinodermata o Starfish o Show clear bilateral symmetry in the larvael stage o Water Vascular Systems: moves stuff in body around with water; Phylum Chordata o VERTEBRATES DOES NOT = CHORDATES they have both vertebrates and invertebrates o Figure 17.32 o Invertebrates: tunicates; lancelets o Vertebrates: Amniotes Reptiles Birds Mammals Tetrapods Amphibians Amniotes Vertebrates Lampreys Cartilaginous fishes Bony fishes Tetrapods o Have nodachords (aka Disks) o Tails o 17.33...
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This note was uploaded on 04/08/2008 for the course BISC 104 taught by Professor ? during the Spring '06 term at Ole Miss.

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4-02 Notes - Oysters o Cephalopods: Octopi (large eyes,...

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