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11 Cards in this Set
- Front
- Back
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What are the 4 classes of Platyhelminthes? |
Trematoda (flukes), Cestoda (tapeworms), Monogenea (parasitic flatworms), Turbellaria (free living flatworms) |
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Do they have body systems? |
Yes, acoelmate |
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Describe the body shape |
Bilateral symmetry |
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What systems do they have? |
Bilateral nervous system with cephalization. Some have eyespots. GVC. Primitive digestion and excretion systems. |
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How do they take in O2? |
Integumentary exchange |
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How do they reproduce |
Sexually (hermaphroditic), asexually (regeneration) |
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Do they move? |
Yes (motile) utilize an undulation form of movement. |
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Describe their environment |
Marine, freshwater, and damp terrestrial habitats. |
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Free living flatworms (turbellaria) |
Freshwater, move with cilia + mucus, single opening in the middle of the stomach, 2 eyespots, carnivores, common all over the world, asexual reproduction + regeneration. |
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Planaria regeneration |
Planarians will spontaneously detach parts of their bodies to regenerate. Planarians can also be cut to regenerate. |
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Parasitic flatworms (monogenea) - pork tapeworm |
Pigs + humans, lives in intestines and passes eggs through feces, adapted to internal environment (ex., no digestive system as they live in digestive fluid), epidermis tegument to protect from host, flat + long, scolex and suckers, broglattids (reproductive systems) |
