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17 Cards in this Set
- Front
- Back
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Which superphylum does Phylum Platyhelminthes belong to? |
Superphylum Lophotrochozoa |
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What kind of animals belong to Phylum Platyhelminthes? |
Flatworms, flukes, and tapeworms |
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What kind of environment do flatworms live in? |
Marine |
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Describe the body plan of flatworms. |
Bilaterally symmetrical Triploblastic- 3 germ layers Acoelomate- ONLY phylum without coelom |
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What does tissue cooperation result in? Give examples. |
Sense organs: Ocelli- eye spots Auricle- "ears" |
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Describe flatworms' nervous mechanism. |
Cerebral ganglia (nerve bodies) and double ventral nerve cords |
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Describe flatworms' digestive mechanism. Is it complete or incomplete? |
Gastrovascular cavity- incomplete |
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What is the pharynx? |
The mouth/anus tube that leads to the gastrovascular cavity |
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Describe flatworms' respiratory mechanism. |
Diffusion |
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Describe flatworms' circulatory mechanism. |
None |
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Describe flatworms' nitrogen waste removal mechanism. |
Diffusion |
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What do flatworms use for structural support? |
They do not have structural support. |
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How do flatworms move? |
Flatworms have cillia on their ventral sides and they have muscle cells. |
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How do flatworms maintain internal stability? |
In marine environments, they are conformers. In freshwater environments, they use tubules and flame cells. |
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How do flatworms reproduce? |
Asexually- regeneration Sexually- flatworms are hermaphroditic |
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What class or classes belong in Phylum Platyhelminthes? Describe an example of each. |
Class Turbellaria: Planaria/Dugesia- non-parasitic Class Trematoda: Flukes- parasitic in digestive systems Class Cestoda: Tapeworms- parasitic in digestive systems; attaches to intestinal walls using hooks and suckers |
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What are proglottids? |
Segments of a tapeworm |
