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Animals:Lesson 1 & 2

Homeostatis The condition in which an organism's internal environment is kept stable in spite of changes in its external environment.
Adaptation An inherited behavior or physical characteristic that helps an organism survive and reproduce in its environment.
Vertebrate Animals that have a backbone.
Invertebrate Animals that don't have a backbone.
Tissue A group of similar cells that perform a specific function.
Organ A body structure that is composed of different kinds of tissues that work together.
Radial Symmetry Multiple lines of symmetry.
Bilateral Symmetry Only one line of symmetry.
Created by: iphillippe