Animalia Invertebrates Phylum and Classes
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5 terms
Terms | Definitions |
|---|---|
 Phylum Porifera | Sponges; a body made of cells and many species; sessile; filter\suspension feeder; digestion happens inside cells; osculum; hermaphrodite; simplest of all animals; no true tissues, but do have specialized cells. |
| Phylum Cnidaria | Have true tissues; include jellyfish, anemones, corals, hydra; two forms medusa (free swimming) or polyp (sessile); have cnidocytes (stinging cells); gastrovascular cavity. |
| Phylum Ctenophora | Comb jellies; rows of fused cilia, relatives of Cnidaria. |
| Phylum Platyhelminthes | Flat worms: -Divided into 3 classes. -First to show bilateral symmetry. |
| Class Turbellaria | Contain free living, small flat worms, examples: planaria, many species of marine worms; have a simple brain and nerves that branch out throughout the body; have complex gastovasacular cavity; show great powers of regeneration. |
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