2010_Skeletons_1B&W

2010_Skeletons_1B&W - 1 BIOL1040 August 2010...

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2 BIOL1040 August 2010 Skeletons Scaffolding for the body Readings Campbell (2006), pp. 1065-1067, 692; Prof Mike Benne pp. 496, 671-673, 675-676, 448-449 Campbell et al . (2008). pp. 676, 690-696, pp. 463-468, 532-533, 867-872, 1130-1132 Prof. Mike Bennett m.bennett@uq.edu.au 417 Otto Hirschfeld (Building 81)
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3 Learning Objectives To appreciate the variety of skeletal ‘designs’ To understand basic roles skeletons play To appreciate the purposes and processes of growth and adaptation of skeletal structures To learn about the composition, structure and function of vertebrate bone To understand why and how bone is modelled and remodelled
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4 A skeleton is the framework of any structure and in biological i i t d t l What is a skeleton? organisms it does not always consist of bones Support, Protection, Movement Basic roles Types of skeletons • Hydroskeletons Exoskeletons • Endoskeletons Key Concept: Different skeletons, different benefits
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5 Skeletal features are important for taxonomy For example: • Chitin exoskeletons are a feature of Arthropods (Taxon = phylum) A shell is a feature of Mollusc Taxon = phylum A shell is a feature of Molluscs (Taxon = phylum) Vertebrates have back bones (Taxon = subphylum) Craniata have skulls (Taxon = clade of chordata [phylum level]) Gnathostomata have jaws (Taxon = infraphylum level) Tetrapods have four limbs (Taxon = superclass level)
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6 Hydroskeletons Fluid held under pressure in a Fluid held under pressure in a closed, semi-rigid, body compartment • Muscles anchor to compartment wall and change shape of the
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2010_Skeletons_1B&W - 1 BIOL1040 August 2010...

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