Mollusks

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Mollusks
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A scallop --- a bivalve
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Smooth lining

• Irritants are coated by mantle to protect soft
  body

Pearls
Animation from http//vilenski.org/science/notebo
ok/unit5/invertebrate/menu.html
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Clam Anatomy and Dissection
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• NO CEPHALIZATION (No head)
• Shell valve (Bivalvia 2 shells)
• Growth rings - increase with age

http//wwwbio200.nsm.buffalo.edu/labs/tutor/Clam/
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Clam anatomy
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ADDUCTOR MUSCLES

• Turn POSTERIOR END toward doorCut your adductor
  muscles to open shell

Image from http//sps.k12.ar.us/massengale/mollu
sk_notes_b1.htm
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ANTERIOR POSTERIOR ADDUCTORS
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FOOT points toward anterior end
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VISCERAL MASS
Contains heart, digestive, excretory,
reproductive
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INCURRENT EXCURRENTSIPHONS
move food up toward mouth
CILIA on gills pull in water
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• Mantle produces shell (calcium carbonate makes
  it hard)

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http//wwwbio200.nsm.buffalo.edu/labs/tutor/Clam/
DIGESTIVE GLAND Makes BILE to break down fat
Finishes
digestion