animal summary notes

animal summary notes - Summary characteristics for the...

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Kingdom Animalia Summary characteristics for the different animal phyla Phylum Porifera (sponges) - asymmetrical  - loose assemblage of cells, lacks true tissues - unique cells – choanocytes (collar cells), flagellated cells that draw water in and filter  food particles - Genera represented –  Grantia Euplectella , and  Spongia Phylum Cnidaria - radial symmetry  - true tissues, lacks true organs - two germ layers (endoderm and ectoderm, no true mesoderm) - characteristic cells – cnidocytes, stinging cells involved in predation - polymorphism, alternate between a polyp and medusa, the classes of cnidarians are  characterized by which morph is dominant o Class Hydrozoa – polyp morph dominates, typically small medusa genera represented:  Hydra, Obelia, Physalia, Gonionemus   o Class Scyphozoa (jellyfish) – medusa morph dominates, small polyp stage genera represented : Aurelia  
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This note was uploaded on 04/09/2008 for the course BIO 1306 taught by Professor Adair,tamarah during the Spring '08 term at Baylor.

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animal summary notes - Summary characteristics for the...

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