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Definition
| head-foot/head merges w/ foot; marine, pelagic; mobile carnivores; trend of internalization or loss of shell |
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Term
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Definition
| early cephalopods: chambered external shell, now:nautilus: siphuncle-tissue w/blood vessels, replace fluid w/ gas to keep afloat |
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Term
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Definition
| closed circulatory system; all blood in vessels, no hemocoels; crenidia, not ciliated (gills); efficient circulatory system |
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Term
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Definition
| complex brain-remember and learn; camoflauge |
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Term
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Definition
| Excellent; advanced eyes similar to mammals; move lens back and fourth |
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Term
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Definition
| gonochoristic; copulate:modified arms transfer sperm packages(spermatophores) into mantle cavity of female |
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Term
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Definition
| direct development of young in egg masses |
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