Chapter 33 notes

Chapter 33 notes - 6/13/11 Invertebrates Click to edit...

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Click to edit Master subtitle style 6/13/11 Chapter 33 Invertebrates
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6/13/11 Most Recent Hypothesis About Animal
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6/13/11 Concept 33.1: Sponges are basal animals Live in both fresh and marine waters Lack true tissues and organs Asymmetrical body
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6/13/11 Sponges Sponges are suspension feeders Filter water passing through their bodies
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6/13/11 Clicker Question Water movement through a sponge would follow what path? Pore > spongocoel > osculum * Blastrpore > gastrovascular cavity > protstome Choanocyte > mesohyl > spongocoel
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6/13/11 Concept 33.2: Cnidarians are an ancient phylum of eumetazoans
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6/13/11 Cnidarians A wide range of sessile and floating forms including jellyfish, corals, and hydras Simple diploblastic, radial body plan Body plan is a sac with a central gastrovasclar cavity Single opening serves as both mouth and anus Mesoglea layer between epidermis and
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6/13/11 Cnidarian body Plans Polpy form is generally sessile Medusa form moves freely in water by Figure 33.5
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6/13/11 Defining feature of cnidarians Cnidocytes Unique cells that function in defense and the capture of prey Figure 33.6
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6/13/11 Cnidarian Figure
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Clicker question How many planes through the central axis will divide an organism with radial symmetry into roughly equal halves? 1
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Chapter 33 notes - 6/13/11 Invertebrates Click to edit...

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