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Mollusks

Mollusks. Adi Beal, Lynsey Brinker, Deanna Holby, Rylie Williams. Symmetry in mollusks. Bilateral symmetry. How do mollusks move?. Most – muscular foot Tentacles Shells.

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Mollusks

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  1. Mollusks Adi Beal, Lynsey Brinker, Deanna Holby, Rylie Williams

  2. Symmetry in mollusks • Bilateral symmetry

  3. How do mollusks move? • Most – muscular foot • Tentacles • Shells http://gotmuscle.weebly.com/mollusca.html

  4. Nervous system • Present nervous system • Nerve bundles • Ganglia • Squid-large developed eyes similar to human

  5. Digestive System • Siphon system • Waste

  6. Excretory system • Nephridium • Kidney • One-way

  7. Circulatory system • Cephalopods-closed • Gastropods and Bivalves-open

  8. Respiratory System • Siphons • Gills

  9. Support of skeletal system • Outer shell • Soft body • Muscular foot • Tentacle's

  10. Reproductive system • Sexually • Gonad

  11. Three main classes • Gastropod/Univalves • Bivalves • Cephalopods http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Invertwp/inv_class_of_06_wp/jiali_cuttlefish/classification.htm http://www.isgs.uiuc.edu/outreach/geology-resources/gastropods http://www.thecanadianencyclopedia.ca/en/article/mollusc/

  12. Gastropods/Univalves • Largest group of mollusks’ • Snails, conchs (univalves), abalones, whelks, sea slugs, and garden slugs • On shell (except slugs) • rhythmic contraction of muscular foot • Use radula to scrape up food www.caribbeanfmc.com islandcolors.com www.slugwatch.co.uk

  13. Bivalves • Clams, oysters, and scallops • Two-part, hinged shell joined by strong muscles • Close shell by contracting muscles • Well adapted to living under water • Clams move with their foot • Scallops open and close shell rapidly tbep.org trueoyster.com

  14. Cephalopods • Most specialized and complex group • Squid, octopuses, cuttlefish, and chambered nautiluses • Foot divided into many tentacles • All live in water • Well developed nervous system • Only mollusks with closed circulatory system www.arkive.org www.practicalfishkeeping.co.uk

  15. Why are cephalopods mollusks? • Similar internal structures • U shaped digestive track • mantle • Used to have a shell • Now kind of internal userwww.sfsu.edu

  16. Videos • Cuttlefish Video • http://video.nationalgeographic.com/video/worlds-deadliest-ngs/deadliest-cuttlefish-hypnosis • Giant Squid Video • http://www.discovery.com/tv-shows/curiosity/videos/first-video-of-a-giant-squid.htm • Scallop Video • http://www.youtube.com/watch?v=zaYNFQd_7HE

  17. Other Phylum Facts

  18. Mollusks are referred to as “soft-bodied” because… • Composed of shell and fleshy body • The shell protects the soft body • Fleshy part divided into foot & visceral mass • Organs stored soft, fleshy visceral mass

  19. The real meaning • Gastropod: “stomach foot” • Cephalopod: “head foot”

  20. How pearls are created • In oysters, clams, and mussels • Foreign substance in shell and mantle • Mantle creates substance to protect itself • Mantle layers irritant in mantle substance • Eventually results in a shell

  21. Coelom • Body cavity in Metazonas • Testinal canal and Body wall • Seperation • Transports nutrients

  22. Snail diagram Ganglia

  23. Clam diagram Palps Gills PosteriorAbductorMuscle Mouth Anterior Abductor Muscle Mantle-produces shell Foot

  24. 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>.

  25. Photo Work Cited • http://shells.tricity.wsu.edu/ArcherdShellCollection/Illustrations/NervousSystem.html • http://www.livebinders.com/play/play/307257 • http://www.madsci.org/posts/archives/1998-05/892237971.Zo.r.html • http://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

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