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| Figure number: File name: |
22.1.1a 22_1_1a.swf |
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| Title: | The Animal Family Tree: Definitions and Characteristics. |
| Caption: | This component explains the structure of the animal family tree. |
| Keywords: | animal family tree, animals, phyla, phylum, Porifera, Cnidaria, Platyhelminthes, Mollusca, Annelida, Arthropoda, Echinodermata, Chordata, bilateral symmetry, protostomes, deuterostomes, coelom, pseudocoel |