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Muscular Foot
The means of locomotion for a mollusc, highly modified across Phyllys.
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Mantle
A dorsal membrane that secretes the shell.
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Radula
A rough tongue that rasps food.
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Class Polyplacophora
Chitons; Their shell consists of 7 or 8 flattened dorsal plates.
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Class Gastropoda
Snails, slugs, abalones, etc.; Well developed head, uses torsion to balance shells, only non aquatic mollusc.
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Class Bivalvia
Clams, mussels, etc.; 2 Shells hinged on the dorsal side, no radula and reduced head
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Class Cephalopoda
Squids, Octopuses, nautiluses, and cuttlefish; reduced or absent shell, advanced eyes, tentacled foot, well developed head.
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Tentacle (snail)
2 pairs on the head, used as eye stalks and feelers.
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Pneumostome
Brings air into the respiratory chamer of the snail.
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Planospiral
The flat coil of the snail shell
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Conispiral
non flat curl of the snail shell.
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Byssal threads
Attaches a mussel to a hard surface. Very hard substance.
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Umbo
The point of a bivalve organisms shell, where they connect.
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Siphons
Do gas, food, and waste exchange for the clam.
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posterior (clam)
Opposite end of the umbo.
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Anterior and Posterior adductor muscles
Muscles that contract to pull the two valves together.
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Lateral Teeth
Assist in correct closing of valves
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Pseudocardinal teeth
Assist in correct closing of the valves.
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Pallial line
The line where the mantle attached to the valves (via pallial muscle)
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Growth lines
External evidence of growth on the valves.
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Nacreous layer
The smooth innermost layer that is in contact with the animal.
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Prismatic layer
the strongest layer of the shell made of large crystals of calcium carbonate.
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Periostracum
An outer waterproofing and protective layer.
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Hemocoels
Open cavities that bath the tissues directly with hemolymph.
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Hymolymph
Acellular substance which functions like blood.
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Funnel
The squid uses the funnel to suck water in and out, expels waste, and expels ink. Uses it for propulsion as well.
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Mantle collar
The bottom part of the mantle of a squid that rings around the head.
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Pen
The pseudo shell of a squid, made of chiton.
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Nidamental glands
Provide shell material for the eggs of a squid.
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Sepia
The "ink" of a squid, a melanin-rich substance.
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Branchial heart
2 are found in a squid, each pumping for their respective gills.
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Systemic heart
Pumps blood through out entire body.
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