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11 Cards in this Set
- Front
- Back
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what characteristic is responsible for the branching off of the flatworms from earlier animals? |
no coelm (acoelomates) |
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what level organization do these organisms have? |
3 tissue layers: endo, ecto and mesoderm |
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what type of digestive system is seen in these animals? |
complete digestive called alimentary canal includes mouth and anus
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level of organization? |
organ system level |
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type of excretory system? |
protonephridia (flame cells) |
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type of circulatory system? |
none |
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type of respiratory system? |
none |
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type of nervous system? |
pair of anterior ganglia with longitudinal nerve cords |
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type of asexual reproduction? |
regeneration |
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type of sexual reproduction? |
gametes, usually monoecious |
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what are the 3 classes of platyhelminthes? |
turbellarians; ocelli (eyespot, light detection), auricles (bumps on head)chemical detectors
trematoda: tegument (skin), multiple hosts spend part of life cycle in invert/vertebrates such as snails, crabs, fish and birds
cestoidea: scolex (head of tapeworm), proglottids (body parts of tapeworm) |
