Term
| Do flatworms have a coelom? |
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Definition
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Term
| what level of organization do flatworms and ribbonworms have? |
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Definition
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Term
| What fills the spaces in platyhelminthes? |
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Definition
| cellular mesodermal parenchyma |
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Term
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Definition
| they rely on the host's digestive tract, and absorb digested molecules |
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Term
| What are protonephridia used for in planarians? |
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Definition
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Term
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Definition
| light-sensitive eyespots in most planarians |
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Term
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Definition
| used for sensing direction of water currents |
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Term
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Definition
egg is excreted from host, reaches water
- hatches into a free-swimming ciliated larva (miracidium)
- penetrates tissues of a snail, becomes a sporocytst
-reproduces asexually into more sporocysts or many rediae
- Cerceriae emerge from the snail and find a 2nd intermediate hosts and/or encyst and become metacercaeriae or jeuvenille flukes
- metacercaria are eaten by the host and grow into an adult
basically: miracidium, redia, cercaria, metacercariae (eaten by definitive host) |
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Term
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Definition
| cirrhosis of the liver, can be fatal |
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Term
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Definition
| damage liver, and are often fatal --> one of the major infectious diseases in the world |
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Term
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Definition
| cercariae hosted by birds can attach to swimmers in northern lakes |
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Term
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Definition
| the ciliated larva of monogenea that attaches to a host by posterior hooks |
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Term
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Definition
| the attachment organ of the adult in monogenea |
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Term
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Definition
| holdfast portion with suckers and hooks on a tapeworm |
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Term
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Definition
| increase surface area for food absorption in tapeworms |
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Term
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Definition
juvenile forms found in cattle
adults live in humans --> get it from eating rare beef |
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Term
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Definition
| get it from eating undercooked pork...infections can develop in the eye or brain leading to blindness or death |
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Term
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Definition
adult stages found in mammals
immature stags founds in fish and crustaceans
contracted by eating raw fish |
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Term
| What are advances that ribbon worms have over flatworms? |
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Definition
- an eversible proboscis
- complete digestive system that is more efficient
- simplest animals with blood-vascular system |
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Term
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Definition
| in ribbon worms, it is an eversible organ protruded from a rhynchocoel for defense and catching prey |
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