Notes on Subphylum Polychaeta

Notes on Subphylum Polychaeta - Subphylum Polychaeta(marine...

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Subphylum Polychaeta (marine worms) 1. 1. Diverse feeding strategies: mud, organ detritus, microbes, plankton or small invertebrates 2. 2. Can possess eyespots or stalked eyes 3. 3. Have many setae (small bristlelike appendages occurring in pairs on lateral and ventral sides) 4. 4. Each segment also carries a pair of fleshy appendages called parapodia 5. 5. Parapodia can facilitate crawling, burrowing, or swimming; and can enhance oxygen uptake 6. 6. Separate sexes, external fertilization
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Unformatted text preview: • • Key Body Plan Traits 1. 1. Triploblastic animals 2. 2. Protostome 3. 3. Eucoelomate 4. 4. True segmentation: body subdivided by septa in equivalent metameric units or segments. Each segment is equipped with the same set of excretory and locomotory organs. 5. 5. Some regionally modified segments 1. Ex. Earth worm 1. Prostomium or cephalic region [front] 2. Peristomium [near front] 3. Pygidium [back]...
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  • Spring '10
  • Kant
  • Annelid, Subphylum POLYCHAETA, Diverse feeding strategies, small bristlelike appendages, regionally modified segments

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