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Chapter 4 Lesson 3

Terms from the Interactive Science Textbook.

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."
Arthropod "An invertebrate that has an external skeleton, a segmented body, and jointed appendages."
Endoskeleton "An internal skeleton; structural support system within the body of an animal."
Echinoderm "A radially symmetrical marine invertebrate that has an internal skeleton and a system of fluid-filled tubes."
Exoskeleton "External skeleton; a tough, waterproof outer covering that protects, supports, and helps prevent evaporation
Created by: tschulz