adi beal, lynsey brinker, deanna holby, rylie williams
TRANSCRIPT
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Mollusks Adi Beal, Lynsey Brinker,
Deanna Holby, Rylie Williams
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Symmetry in mollusks Bilateral symmetry
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How do mollusks move?Most – muscular footTentacles Shells
http://gotmuscle.weebly.com/mollusca.html
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Nervous systemPresent nervous systemNerve bundlesGangliaSquid-large developed eyes similar to human
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Digestive SystemSiphon system Waste
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Excretory systemNephridium KidneyOne-way
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Circulatory systemCephalopods-closed Gastropods and Bivalves-open
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Respiratory SystemSiphonsGills
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Support of skeletal systemOuter shellSoft bodyMuscular foot Tentacle's
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Reproductive systemSexuallyGonad
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Three main classesGastropod/UnivalvesBivalvesCephalopods
http://www.isgs.uiuc.edu/outreach/geology-resources/gastropods
http://www.thecanadianencyclopedia.ca/en/article/mollusc/
http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Invertwp/inv_class_of_06_wp/jiali_cuttlefish/classification.htm
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Gastropods/UnivalvesLargest group of mollusks’Snails, conchs (univalves), abalones, whelks, sea slugs, and
garden slugs On shell (except slugs) rhythmic contraction of muscular footUse radula to scrape up food
islandcolors.com www.slugwatch.co.uk www.caribbeanfmc.com
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BivalvesClams, oysters, and scallopsTwo-part, hinged shell joined by strong musclesClose shell by contracting musclesWell adapted to living under waterClams move with their footScallops open and close shell rapidly
trueoyster.com tbep.org
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CephalopodsMost specialized and complex groupSquid, octopuses, cuttlefish, and chambered nautilusesFoot divided into many tentacles All live in waterWell developed nervous systemOnly mollusks with closed circulatory system
www.practicalfishkeeping.co.uk
www.arkive.org
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Why are cephalopods mollusks?Similar internal structures
U shaped digestive trackmantle
Used to have a shellNow kind of internal
userwww.sfsu.edu
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VideosCuttlefish Video
http://video.nationalgeographic.com/video/worlds-deadliest-ngs/deadliest-cuttlefish-hypnosis
Giant Squid Videohttp://
www.discovery.com/tv-shows/curiosity/videos/first-video-of-a-giant-squid.htm
Scallop Videohttp://www.youtube.com/watch?v=zaYNFQd_7HE
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Other Phylum Facts
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Mollusks are referred to as “soft-bodied” because…Composed of shell and fleshy bodyThe shell protects the soft bodyFleshy part divided into foot & visceral massOrgans stored soft, fleshy visceral mass
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The real meaningGastropod: “stomach foot”Cephalopod: “head foot”
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How pearls are createdIn oysters, clams, and musselsForeign substance in shell and mantleMantle creates substance to protect itselfMantle layers irritant in mantle substanceEventually results in a shell
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Coelom• Body cavity in Metazonas• Testinal canal and Body wall• Seperation • Transports nutrients
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Snail diagram
Ganglia
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Clam diagram
PosteriorAbductorMuscle
GillsPalps
Mouth
Anterior Abductor Muscle
Foot Mantle-produces shell
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Works Cited"Coelom." - Definition from Biology-Online.org. N.p., n.d. Web. 02 Oct. 2014.
<http://www.biology-online.org/dictionary/coelom>.
"Marine Education Society of Australasia." Marine Education Society of Australasia. N.p., n.d. Web. 02 Oct. 2014. <http://mesa.edu.au/>.
"Mollusks." - Acadia's Oceanside Meadows Inn. N.p., n.d. Web. 02 Oct. 2014. <http://www.oceaninn.com/wildlife/mollusks.htm>.
N.p., n.d. Web. <http%3A%2F%2Fmolluskscience.weebly.com>.
N.p., n.d. Web. <http%3A%2F%2Fwww.earthlifenetinverts%2Fmollusca.html>.
N.p., n.d. Web. <http%3A%2F%2Fwww.tulane.edu%2Fbfleury%2Fdiversity%2Flabguide%2Fmlannel.html>.
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Photo Work Cited http://
shells.tricity.wsu.edu/ArcherdShellCollection/Illustrations/NervousSystem.html
http://www.livebinders.com/play/play/307257http://
www.madsci.org/posts/archives/1998-05/892237971.Zo.r.htmlhttp://
www.studyblue.com/notes/note/n/mollusks-and-annelids/deck/6225786
https://www.google.com/imghp?hl=en&tab=wi&ei=M-wuVKakLYy9uASb9YIQ&ved=0CAQQqi4oAg