1 - -Hydrostatic skeleton with longitudinal muscles circular muscles for movement Marine annelids have parapodia on each segment for

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AP Biology Campbell Textbook Notes Annelids - Segmented bodies, true coelom lined with mesoderm, mouth to anus. - Feeding: pharynx pumps food/soil into tube called esophagus, food moves thru crop, sometimes it is stored or it move thru the gizzard, where it is ground into smaller pieces, then moves to intestine. - Closed circulatory system: blood contained within blood vessels, dorsal vessel (tail to head, like a heart), ventral vessel (head to tail) - Gills: exchanges gases underwater in aquatic annelids, moist skin in terrestrial annelids. - Nephridia: cellular waste w/ nitrogen is eliminated
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Unformatted text preview: -Hydrostatic skeleton, with longitudinal muscles, circular muscles for movement. Marine annelids have parapodia on each segment for swimming. -Clitellum: band of thickened, specialized segments which secrete a mucous ring into which sperm and eggs are released-Oglichaetes: earthworms (terrestrial), tubifex (aquatic), produce castings of undigestible food.-Leeches: external parasites, suck blood, used for medicine, Probocis: muscular extension into tissue.-Polychaetes: aquatic only, have paddlelike appendages, more setae than oglichaetes....
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This note was uploaded on 01/02/2012 for the course BIO 101 taught by Professor Dr.chan during the Fall '11 term at Marine Biological Laboratory.

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