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Mollusks. Adi Beal, Lynsey Brinker, Deanna Holby, Rylie Williams. Symmetry in mollusks. Bilateral symmetry. How do mollusks move?. Most – muscular foot Tentacles Shells. - PowerPoint PPT Presentation
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Mollusks Adi Beal, Lynsey Brinker,
Deanna Holby, Rylie Williams
Symmetry in mollusks Bilateral symmetry
How do mollusks move?Most – muscular footTentacles Shells
http://gotmuscle.weebly.com/mollusca.html
Nervous systemPresent nervous systemNerve bundlesGangliaSquid-large developed eyes similar to human
Digestive SystemSiphon system Waste
Excretory systemNephridium KidneyOne-way
Circulatory systemCephalopods-closed Gastropods and Bivalves-open
Respiratory SystemSiphonsGills
Support of skeletal systemOuter shellSoft bodyMuscular foot Tentacle's
Reproductive systemSexuallyGonad
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
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
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
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
Why are cephalopods mollusks?Similar internal structures
U shaped digestive trackmantle
Used to have a shellNow kind of internal
userwww.sfsu.edu
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
Other Phylum Facts
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
The real meaningGastropod: “stomach foot”Cephalopod: “head foot”
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
Coelom• Body cavity in Metazonas• Testinal canal and Body wall• Seperation • Transports nutrients
Snail diagram
Ganglia
Clam diagram
PosteriorAbductorMuscle
GillsPalps
Mouth
Anterior Abductor Muscle
Foot Mantle-produces shell
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>.
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
