Mollusca vania rolla
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Mollusca vania rolla

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Mollusca vania rolla Mollusca vania rolla Presentation Transcript

  • MOLLUSCA
    Vania and Rolla
    Kingdom: Animalia
    Phylum: Lophotrochozoa
  • Characteristics
    Soft bodies
    Typically only consists of head and foot part
    Body often covered with hard exoskeleton
    Live in terrestrial mountain tops to the hot vents and cold seeps of the deep sea
    Size from 20 m long to microscopic size
  • Structure
    View slide
  • Classes
    MOLLUSCA
    View slide
  • Class Bivalvia (Pelecypoda)
    Bi = two
    Valvia = valves
    Bivalvia = have shells composed of two pieces of valves
    The valves are used to protect themselves from danger and allowing the animals to move in water by clapping the valves together
  • Lifecycle
  • Examples
    Mussels
    Oysters
    Scallops
    Clams
  • Class Gastropoda
    They have single shell or no shell
    Can be found in both salt or fresh water and on land
    More active and mobile than bivalves
    There is a concentration of nerve cells in the tentacles and at the anterior end
    In some animals, eyes are highly developed
  • Lifecycle
  • Examples
    Snails
    Whelks
    Abalone
    Slug
  • Class Cephalopoda
    Considered as the most evolutionarily advanced animals to be found among the invertebrates
    Has a large head, conspicuous eyes and a central mouth surrounded by arms
    They have well-developed brains, resulting in highly developed sensory system and predatory behavior
  • Lifecycle
  • Examples
    Octopus
    Squid
    Cuttlefish
  • Roles
    Food source
    Economic activities  pearl selling, seafood marketing, shells are used for button producing
    Decorative materials
    Building materials  shells of oyster are mixed with tar and used for road making un US
  • Sources
    http://www.blurtit.com/q631046.html
    www.ucmp.berkeley.edu/taxa/inverts/mollusca/mollusca.php
    infusion.allconet.org/webquest/PhylumMollusca.htm