Mollusks
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| Three classes of mollusks. | Bivalvia, Gastropoda, Cephalopoda
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| What does bivalvia mean? | "Two shells"
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| What does gastropoda mean? | "Stomach foot"
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| What does cephalopoda mean? | "Head foot"
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| All mollusks have these three body parts. | muscular foot, visceral mass, mantle
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| Part of a mollusk that secretes the shell. | mantle
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| Part of a mollusk that contains the internal organs. | visceral mass
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| Example bivalves. | clams, oysters, scallops, mussels
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| Example gastropods. | snails, slugs, nudibranchs (sea slugs)
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| Example cephalopods. | squid, octopus, nautilus, cuttlefish
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| Mollusks have a true coelom and are therefore considered | coelomates
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| Type of digestive system that contains a mouth AND an anus. | complete digestive system
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| Kidney-like organs used to excrete wastes. | nephridia
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| All mollusks have this type of symmetry. | bilateral
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| Tongue-like organ with rows of teeth used for scraping, drilling, and breaking down food. (only found in gastropods and cephalopods). | radula
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| Class of mollusks that use siphons to filter feed. | bivalvia
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| Part of a bivalve used to dig or burrow into the sand. | foot
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| Strong muscles used to keep a bivalve's shells closed. | adductor muscles
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| Bivalves and gastropods have blood that doesn't travel in vessels throughout the entire body. | open circulatory system
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| Cephalopods have blood that travels in vessels throughout the entire body. | closed circulatory system
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| A harpoon-like projection found in some snails. | proboscis
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| 180 degree twisting of a gastropods visceral mass and mantle. | torsion
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| Example gastropod with venomous spines. | nudibranchs (sea slugs)
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| A cephalopod's foot has been modified into different __________ contain suction cups. | arms/tentacles
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| Most cephalopods have a parrot-like ___________ for biting their prey. | beak
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| A tube-like organ on a cephalopod uses to take in and expel water. Can also be used for jet propulsion. | siphon
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| Cephalopod's sperm sac. | spermatophore
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| Class of mollusks considered to be the most intelligent of all invertebrates. | Cephalopoda
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| Cells that contains pigments that change color based on a cephalopod's environment. | chromatophore
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| Flaps on the mantle that help some cephalopods with swimming. | fins
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| Structures found on the clubs of a squid's feeding tentacles used to capture and hold on to prey. | toothed suckers
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| Sensory structures located at the anterior end of a gastropod. | tentacles (some contain eyespots for seeing)
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| Small pore in a gastropods side used for breathing. | respiratory pore
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| Oldest part of a bivalve's shell; where the two shells meet. | umbo
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| Parts of a bivalve that bring in water (and thus food and oxygen) AND excrete waste (including CO2). | incurrent and excurrent siphon.
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| As a bivalve grows, new parts of the growing shell are laid down in _________________, with the older ones closest to the umbo. | rings
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