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Chapter 15 - Figure 15.co Figure 15.11 Phylum Nematomorpha...

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CHAPTER 15 PSEUDOCOELOMATE ANIMALS
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Outline Pseudocoelomates Phylum Nematoda Phylum Nematomorpha Phylum Rotifera
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Pseudocoelomate Animals Pseudocoel Derives from blastocoel Lacks peritoneal lining
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Pseudocoelomate Animals Pseudocoel Advantages - Greater movement - Space for organ systems - Greater circulation - Storage for wastes - Hydrostatic organ
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Phylum Nematoda One of the largest pseudocoelomate phyla Covered by cuticle Longitudinal muscles
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Phylum Nematoda Fluid in pseudocoel Most dioecious Several juvenile stages Many parasitic
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Unformatted text preview: Figure 15.co Figure 15.11 Phylum Nematomorpha • Horsehair worms • Parasitic juvenile stage Arthropod host No circulatory, respiratory, or excretory system Phylum Nematomorpha • Free-living adult stage Aquatic Resembles adult nematode Phylum Rotifera • Small • Freshwater • Ciliated corona • Pharynx Mastax Review • Pseudocoelomates Phylum Nematoda Phylum Nematomorpha Phylum Rotifera Reminders • Read Chapter 15 • Exam 4 • Lab Exam 2...
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