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BODY LAYERS
-Sponges have specialized cells but not tissues or organs. -Cnidarians (jellyfish, coral, seaanemone) have two bodies. -Cnidarians have one body opening that openis into a large vascular cavity called the gastrovascular cavity. -All worms, mollusks, arthropods, echinoderms, and vertebrates have three cell layers (ectoderm, mesoderm, and the endoderm)
Sponges
Cnidarians
3 Cell Layered Animals
gauss0686 added this comment 2011-05-14 14:53:30-05:00
Good work! thks for sharing
gauss0686 added this comment 2011-05-14 14:53:30-05:00
Good work! thks for sharing