Hydra has a radial, polyp body plan with two cell layers and no circulatory system.
Hydra exhibits a polyp body plan, is radially symmetrical, lacks circulatory systems, and has two cell layers (ectoderm and endoderm) separated by mesoglea.
| Front | Hydra Body Plan |
|---|---|
| Back | - polyp (jellyfish: medusa) - all bodies in phylum are primitive, radial - no circulatory/transport system - 2 cell layers: ectroderm, (mesoglea glue) endotherm |
Tags: chapter_14, hydra
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