Chapter 23 - The Animal Kingdom II Invertebrates 2: Chapter...

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1 The Animal Kingdom II Invertebrates 2: Chapter 23
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2 Evolutionary Tree of Major Phyla
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3 The Invertebrate Phylum: Arthropoda 1. The most numerous in abundance & species diversity (+9,000,000) 2. Habitats: 3. Evolutionary adaptations Exoskeleton for important for exoskeleton is heavy made from protein & polysaccharide called ______ . exoskeleton has to be Jointed legs
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4 Arthropoda adaptations Segmentation – Head support Thorax supports Segmented abdomen
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5 Aquatic arthropods: variation in crustacean segmentation patterns Krill
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6 Arthropod adaptations: cephalization to the max! hly modified jaws & feeding mechanisms Antennae and eye variatio relate to ecology
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7 Arthropod adaptations “Primitive” circulatory system open system that bathes multi-chambered heart annelids have a
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8 Gas exchange in insects Efficient gas-exchange mechanisms Lots of oxygen needed to support trachea tubes gills
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9 Arthropod adaptations Well-developed sensory and nervous systems Compound eyes: fused ganglion brain, nerve cord and ganglia; Tactile and chemical senses Complex behavior -
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This note was uploaded on 02/01/2011 for the course BIOLOGY 1104 taught by Professor Dr.dianeday during the Summer '10 term at Georgia State University, Atlanta.

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Chapter 23 - The Animal Kingdom II Invertebrates 2: Chapter...

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