Invertebrates '11 - Introduction to Animals Click to edit...

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Click to edit Master subtitle style 2/15/11 Introduction to Animals http://www.ted.com/talks/view/id/206
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2/15/11 Kingdom Animalia Circulation – transport of O2, nutrients, and wastes among all their cells Excretion – process of eliminating wastes from the body Response – use nerve cells to respond to their
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2/15/11 Kingdom Animalia Movement – most, but not all, animals are mobile Reproduction – most animals reproduce sexually
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2/15/11 Trends in Animal Evolution Complex animals tend to have: High levels of cell specialization Internal body organization Bilateral symmetry Front end or head with sense organs A body cavity
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2/15/11 Trends in Animal Evolution Animals with bilateral symmetry usually exhibit cephalization concentration of nerve cells and sense organs at the front end of the body
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2/15/11 Early Development Three layers of the developing embryo: Endoder m develops into digestive & respiratory systems Mesoder m develops into muscles and internal organs Ectoder m develops into sense organs and skin
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Body Plans: Coelom – a fluid-filled body cavity that is lined with tissue derived from mesoderm. Acoelomate
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Invertebrates '11 - Introduction to Animals Click to edit...

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