Unformatted text preview: lack of mouth, digestive tract, and nervous system. Their body composition and skeleton are going to be studied in this experiment. The phylum Cnidariam, which refer to stinging animals, contains the taxonomy of two Hydrozoans: Hydra and Obelia . Cnidarians are diploblastic (composed of two cell layers), and are composed of merely eight cell types. The class Hydra is distinguished by its lack of medusa stage, while Obelia contains both the reproductive medusa stage and the polyp stage. The feeding, digestion, circulation, and skeleton are going to be studied in this experiment....
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- Spring '08
- Cnidaria, Phylum Porifera, Obelia