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animals through 3-4
| Term | Definition |
|---|---|
| cnidarian | A radially symmetrical invertebrate that uses stinging cells to capture food and defend itself |
| mollusk | An invertebrate with a soft unsegemented body most are protected by a hard outer side |
| arthropod | an invertebrate that has an external skeleton a segemented body and jointed appendages |
| exoskeleton | external skeleton a tough waterproof outer covering that protects supports and helps prevent evaporation of water from the body of many invertebrates |
| echinderm | a radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid filled tubes |
| endoskeleton | an internal skeleton structural support stystem within the body of an animal |
| chordrate | an animal that has a notochord a nerve cord and throat pouches at some point in its life |
| notochord | a flexible rod that supports a chordates back just below the nerve cord |
| vertbrate | a animal with a backbone |
| ectotherm | an animal whose body temperature is determined by the temparture of its envirment |
| endothderm | an animal whos body tempature is regulated by the internal heat the animal produces |
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Katiegirl28!
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