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Phylum Annelida Polychaete Worms. Characteristics. Segmented bodies Each segment has a pair of bristles Has a circulatory system & gills Has a trochophore larval stage More than 10,000 species Some crawl, some burrow, some build tubes.
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Characteristics • Segmented bodies • Each segment has a pair of bristles • Has a circulatory system & gills • Has a trochophore larval stage • More than 10,000 species • Some crawl, some burrow, some build tubes