Term
| Phylum Platyhelminthes (flat worms) |
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Definition
• dorsoventrally flattened bodies
• bilateral symmetry
• true organ systems
• triploblastic (three true germ layers)
• one opening to the gastrovascular cavity
• acoelomate (have no body cavity).
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Term
| Class Turbellaria ( free-living flatworms ) |
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Definition
• Hermaphroditic • eyespots • pharynx • fig 37. 2: three germ layers, pharynx
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Term
| Class Trematoda (parasitic flukes) |
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Definition
- endoparasites and ectoparasites
- lack epidermis and epicuticle
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Term
| Opisthorchis(Clonorchis) chinese liver fluke |
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Definition
• Fig 37.4: sucker, uterus, gastro-vascular cavity, testis |
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Term
| Fasciola Sheep liver fluke |
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Definition
Fig 37.5: sucker, uterus, gastro-vascular cavity, testis
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Term
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Definition
• disease schistomomiasis
• intermediate hosts
• definitive hosts
• dioecious(separate male and female |
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Term
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Definition
• endoparasites
• fig 37.8 scolex, neck, proglottids, gravid proglottids
Taenia
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Term
| Phylum Nematoda (roundworms) |
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Definition
• extraordinary diversity
• round body (due to hydrostatic pressure), cover with cuticle
• complete digestive tract (both mouth and anus)
• pseudocoelom
• elephantiasis and other disease
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Term
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Definition
• Males are smaller and have a hooked posterior end
• Fig 37.14: longitudinal muscles, intestine pseudocoelom, testes, uterus, ovary, oviduct, cuticle |
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Term
| Turbatrix living vinegar eel |
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Definition
• Only longitudinal muscles, whip – like motion
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Term
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Definition
Disease trichinosis
• Encysted larvae
Ancylostoma
Enterobius |
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Term
| Phylum Annelida (segmented worms) |
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Definition
• Segmentation and septa
• True coelom
• Circulatory, digestive, nervous, and excretory systems
• setae
• fig 38.1
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Term
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Definition
• Many setae
• Parapodia and setae
Nereis (clam worm)
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Term
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Definition
• Few setae and lack parapodia
• Alternating contractions of circular and longitudinal muscles against hydrostatic pressure within each segment
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Term
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Definition
• External feature (very important)
• Internal feature (very important)
• Page 421 to page 424, memorize as much as you can
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Term
| Class Hirudinea (leeches) |
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Definition
• No setae and reduced segmentation - Hermaphaditic
- Two suction cuts at the posterior and anterior parts
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