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MOLLUSK

By: Jeff Slavka, Jordan Aloia. MOLLUSK. Mollusca. 150,000 different species Usually have a shell present (1 or 2) Can be internal or external Muscular foot is used to move and/or feeding. Characteristics. Gastropods Single shell Often spiral shaped Ex. Snails, Slugs Bivalves

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MOLLUSK

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  1. By: Jeff Slavka, Jordan Aloia MOLLUSK

  2. Mollusca • 150,000 different species • Usually have a shell present (1 or 2) • Can be internal or external • Muscular foot is used to move and/or feeding

  3. Characteristics • Gastropods • Single shell • Often spiral shaped • Ex. Snails, Slugs • Bivalves • Hinged shells (2 shells) • Ex. Clams, Oysters • Cephalopods • Most have internal shell • Ex. Squid, Cuttlefish • Octopi don’t have a shell at all

  4. Lifestyle • Body support • No skeleton, invertebrate • Mantle produces shell • Muscular foot • Reproduction • Sexual • Male and female structures • Internal fertilization

  5. Lifestyle Con’t • Digestion • Complete digestive tract • Has specialized regions • Mouth and anus • Opened at both ends

  6. Body of Mollusks • Mantle • Outgrowth of the body surface • Produces the shell • Functions in: • Respiration • Waste disposal • Sensory reception

  7. Radula • Extends from the mouth • Slides back and forth • Used to drill through shells

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