MORE MOLLUSKS VOCAB Slide show by Kelly Riedell
MORE MOLLUSKS VOCAB Slide show by Kelly Riedell
RADULA TONGUE covered with teeth unique to mollusks Used to drill OR scrape food off surfaces NO RADULA IN BIVALVES Image from: http: //www. wildsingapore. com/chekjawa/text/i 900. htm#r
CHROMATOPHORES Pigments in the skin that help organisms blend in with their surroundings Image from: http: //www. biosbcc. net/ocean/marinesci/03 ecology/mlimg/mlpop. jpg
COELOM = body cavity In organisms with OPEN CIRCULATION coelom contains circulatory fluid (blood) = HEMOCOEL Blood = HEMOLYMPH Image: http: //fig. cox. miami. edu/Faculty/Dana/ham. gif
CLAMS http: //www. cinderzelda. com/czpics/potato 2. jpg Clams stay in one place = SESSILE Strain food from water = FILTER FEEDERS http: //www. 4 discountcookware. biz/market/15189
MARINE/FRESH WATER MARINE – live in salt water FRESH WATERlive in ponds, lakes, streams, rivers, etc. Image: http: //www. belizeanjourneys. com/grc/mangrove/man 2. jpg
TROCHOPHORE LARVA http: //www. okc. cc. ok. us/biologylabs/Documents/Evolution/Trochophore_larva. htm Found in all AQUATIC mollusks EXCEPT CEPHALOPODS http: //www. mbari. org/seminars/2003/summer 2003/august 4_rouse. html
http: //shells. tricity. wsu. edu/Archerd. Shell. Collection/Illustrations/Torsion. Stages. html TORSION in Gastropods Twisting of body 180° during development
CLASSES of MOLLUSKS Clam from: http: //www. geocities. com/The. Tropics/2428/directory. html BIVALVES http: //seattle. citysearch. com/feature/10243 http: //www. meddybemps. com/shells/2 draw_scallop. html Clams, oysters, scallops
BIVALVES • 2 SHELLS • FILTER FEEDERS • Only mollusks WITHOUT A RADULA • Only mollusks WITHOUT CEPHALIZATION • OPEN CIRCULATION • INDIRECT DEVELOPMENT with a TROCHOPHORE LARVA • SESSILE as ADULTS
CLASSES of MOLLUSKS http: //ippc 2. orst. edu/potato/grayslugs. jpg http: //mysticearth. us/images/conch. JPG http: //www. seaotter. com/marine/research/tritonia/diomedea/pics/pink_nudibranch. jpg Snails, slugs, conchs, nudibranchs
GASTROPODS • MOST HAVE 1 SHELL • MOST SLOW CRAWLING – VEGGIE GRAZERS with RADULA • CEPHALIZATION • OPEN CIRCULATION • Aquatic ones have INDIRECT DEVELOPMENT with a TROCHOPHORE LARVA • TORSION (twisting of body)
CLASSES of MOLLUSKS CEPHALOPODS http: //www. geocities. com/The. Tropics/2428/directory. html http: //www. seasite. niu. edu/indonesian/Themes/Animals/sea/images/cuttlefish. jpg
CEPHALOPODS • • MOST HAVE NO SHELL FAST SWIMMING CARNIVORES (RADULA) CEPHALIZATION Only mollusks with CLOSED CIRCULATION Only group with DIRECT DEVELOPMENT CHROMATOPHORES for camouflage MOST INTELLIGENT of the INVERTEBRATES Many have INK for defense
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