Term
| Lophotrochozoans: Rotifers |
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Definition
1.complete gut
2. Body cavity is a pseudocoel
3.propel themselves by cilia |
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Term
| Lophotrochozoans: Phoronids |
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Definition
1. small sessile worms
2. Secrete chitinous tubes
3. Cilia drive water into lophophore
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Term
| Lophotrochozoans: Brachiopods |
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Definition
1. two-part shells connected by ligament
2, Two halves of the shell are dorsal and ventral
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Term
| Lophotrochozoans: Annelids |
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Definition
1. Coelom in each segment is isolated from coelom in other segments.
2. Most have thin, permeable body wall that serves for gas exchangege |
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Term
| Lophotrochozoans: Annelids:Polychaetes |
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Definition
1. are mostly marine
2. many burrow in soft sediments,
3. one or more pairs of tentacles
4. Parapodia structure- acts gas exchange, sometimes for movement.
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Term
| Lophotrochozoans: Annelids:Clitellates:oligochaetes |
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Definition
Oligochaetes: hermaphroditic, no parapodia, eyes, or tentacles, ie earthworms
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Term
| Lophotrochozoans: Annelids: Clitellates: Leeches |
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Definition
1. lack parapodia and tentacles.
2.Coelom not divided into compartments.
3. Segments at either end modified to form suckers |
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Term
| Lophotrochozoans: Mollusks |
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Definition
Body plan:
•Foot—large, muscular structure, originally for locomotion, support of
internal organs
•Visceral mass- heart, digestive, excretory, and reproductive organs.
•Mantle—fold of tissue that covers organs in visceral mass.
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Term
| Lophotrochozoans: Mollusks |
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Definition
1. Cilia-beat-create water current- creates gas exchagne.
2. Some species-gills-filter feeding; others-rasping structure (radula)- scraping algae.
3. No closed circulatory system.
4. Blood and fluids empty into the hemocoel (oxygen is then delivered)
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Term
| Lophotrochozoans: Mollusks: Chitons |
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Definition
1.Eight overlapping calcareous plates surrounded by a girdle- protects organs and muscular foot.
2. scrape rocks with a radula.
3. cling to rocks with foot.
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Term
| Lophotrochozoans: Mollusks: Gastropods |
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Definition
1. Snails, slugs
2. Move by gliding on foot.
3. Nudibranchs (naked gills) have lost shells
4. Usually toxic w/ bright colors ( aposematic coloration) |
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Term
Lophotrochozoans: Mollusks: Bivalves
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Definition
1. Clams, oysters, scallops, mussels.
2. Hinged, two-part shells
3. Feed-bringing water in incurrent siphon-filter w/ large gills-water exits the excurrent siphon. |
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Term
| Lophotrochozoans: Mollusks: Cephalopods |
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Definition
1. Squids, octopuses, and nautiluses.
2. Excurrent siphon modified-water can be forcibly ejected-move by “jet propulsion.”
3. elaborate courtship behavior |
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Term
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Definition
1.ie roundworms- unsegmented;
thick multilayered
cuticle.
2. Gas exchange- through
gut and cuticle
3. Pharynx-muscular organ-moves materials through gut.
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