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Animals 3

What is an animal? Lesson 3

TermDefinition
cnidarian A radially symmetrical invertebrate that uses stinging cells to capture food and defend itself
mollusk An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell
athropod An invertebrate that has an external skeleton, a segmented body, and jointed appendages
endoskeleton External skeleton; a tough, waterproof outer covering that protects, supports, and helps prevent evaporation of water from the body of many invertebrates
enchinoderm A radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid filled tubes
exoskeleton An internal skeleton; structural support system within the body of an animal
Created by: kdonnelly
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