| Front | Specialized Tissues |
|---|---|
| Back | - cells evolve to specialize in functions, forming groups called tissues - tissues then evolve to create organs, then organ systems, etc. - levels of specialization vary throughout species ex) sponges (no tissue) - cnidarians (primitive tissue) - flatworms (tissue, organs, but no organ systems) - earthworms & arthropods (tissue, organs, organ systems) |
Tags: chapter_12
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