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Characteristics
of Flatworms
- •Marine, freshwater, moist terrestrial
- •Some free-living, many parasitic
- •Bilaterally symmetrical, acoelomate
- •Incomplete gut
- •Sensory organs
- •No organ systems
- •Asexual and sexual reproduction
- •They are flat
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Platyhelminthes
Reproduction
- Monoecious (hermaphroditic)
- Sexual-
Penis Fencing - Asexual
- Fission, budding, regeneration
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Phylum
Platyhelminthes:
- Parasite of vertebrates
- Adapted for parasitism
- Organs for attachment
- Glands produce secretion for attachment
- Often have:
- Protective body covering
- Complex life cycle involving 2 or more hosts
- Examples include
- Schistosoma (blood fluke), which has a snail intermediary
- Tapeworms in beef or pork
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