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Lesson 3 and 4
Chapter 4
| Term | Definition |
|---|---|
| cnidarian | a radially symmetrical invertebrate that uses stinging cells to capture food and defend i self |
| mollusk | an invertebrate with a soft unsegmented body, most are protected by a hard outer shell |
| arthropod | an invertebrate that has an external skeleton, a segmented body, and jointed appendanges |
| exoskeleton | External skeleton;a tough,waterproof outer covering that protects ,supports, and helps prevent evaporation of water from the body of many invertebrates |
| echinoderm | a radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid filled tubes |
| endoskeleton | an internal skeleton ;structural support system inside the body of an animal |
| chordate | an animal that has a notochord ,a nerve cord and throat pouches at sometime in it's life |
| notochord | a flexible rod that supports a chordates back just below the nerve cord |
| vertebra | the bones that make up the backbone of an organisim |
| ectotherm | an animal who's body temperature is determined by the temperature of the enviroment |
| endotherm | an animal who's body temperature is regulated by the internal heat the animal produces |
Created by:
lolkat12
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