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MORE MOLLUSKS VOCAB. RADULA TONGUE covered with teeth unique to mollusks Used to drill OR scrape food off surfaces NO RADULA IN BIVALVES Image from:

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Presentation on theme: "MORE MOLLUSKS VOCAB. RADULA TONGUE covered with teeth unique to mollusks Used to drill OR scrape food off surfaces NO RADULA IN BIVALVES Image from:"— Presentation transcript:

1 MORE MOLLUSKS VOCAB

2 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/i900.htm#r

3 CHROMATOPHORES Pigments in the skin that help organisms blend in with their surroundings Image from: http://www.biosbcc.net/ocean/marinesci/03ecology/mlimg/mlpop.jpg

4 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

5 CLAMS Strain food from water = FILTER FEEDERS Clams stay in one place = SESSILE http://www.cinderzelda.com/czpics/potato2.jpg http://www.4discountcookware.biz/market/15189

6 MARINE/FRESH WATER MARINE – live in salt water FRESH WATER- live in ponds, lakes, streams, rivers, etc. Image: http://www.belizeanjourneys.com/grc/mangrove/man2.jpg

7 TROCHOPHORE LARVA Found in all AQUATIC mollusks EXCEPT CEPHALOPODS http://www.mbari.org/seminars/2003/summer2003/august4_rouse.html http://www.okc.cc.ok.us/biologylabs/Documents/Evolution/Trochophore_larva.htm

8 TORSION in Gastropods Twisting of body 180 ° during development http://shells.tricity.wsu.edu/ArcherdShellCollection/Illustrations/TorsionStages.html

9 Clam from: http://www.geocities.com/TheTropics/2428/directory.html CLASSES of MOLLUSKS BIVALVES Clams, oysters, scallops http://seattle.citysearch.com/feature/10243 http://www.meddybemps.com/shells/2draw_scallop.html

10 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

11 CLASSES of MOLLUSKS Snails, slugs, conchs, nudibranchs http://www.seaotter.com/marine/research/tritonia/diomedea/pics/pink_nudibranch.jpg http://ippc2.orst.edu/potato/grayslugs.jpg http://mysticearth.us/images/conch.JPG

12 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)

13 http://www.geocities.com/TheTropics/2428/directory.html CLASSES of MOLLUSKS CEPHALOPODS http:// www.seasite.niu.edu/indonesian/Themes/Animals/sea/images/cuttlefish.jpg

14 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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