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Definition
| an inveterate with a soft, body most are protected by a hard outer shell. |
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Definition
| when blood is not always inside the blood vessels |
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Definition
| organs that remove oxygen from the water |
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Term
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Definition
| a thin layer of tissue that covers a mollusks internal organ and produces the shell [in mollusks that have a shell |
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Term
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Definition
| a fexible ribbon of tiny teeth used to eat |
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Term
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Definition
| invertebrates that have an external skeleton, a segmented body and jointed appendages |
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Term
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Definition
| waxy outer skeleton the protcts the animal |
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