LAB: Mollusks Flashcards Preview

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Flashcards in LAB: Mollusks Deck (10)
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1

​Mollusks

  • soft bodied invertebrates
  • coelomates, complete digestive system
  • Body
    • Foot - locomotion
    • Mantle - secrete shells
    • Visceral mass
  • Open circulatory system

2

​Phylum

Mollusca

3

Chitons

  • Found in tidal zones of marine areas
  • Shell w/ eight overlapping plates
  • Herbivores
  • Radula - scrape algae

4

Gastropods

  • Snails and slugs
  • Exhibit torsion
  • Foot secretes mucus
  • Many have dorsal shells secreted by the mantle

5

​Cephalopods

  • Advanced mollusks
    • Squid, octopus, nautilus
  • well-developed central nervous system
  • high degree of cephalization
  • closed circulatory system
  • Have chromatophores (pigmented cells) which can change colors rapidly

6

Squid

  • Fast moving
  • Predators
  • Beak
  • Ink clouds - defense

7

​Octopus

  • 8 arms
  • "walk"
  • "swim"
  • "jet"

8

​Nautilus

  • only cephalopod with external shell
  • Shell is chambered

9

​Bivalves

  • Clams, mussels, scallops, and oysters
  • Have 2 part hinged shell (valve)
  • Filter feeders

10

Clam Dissection and Anatomy