1. Cnidarian Vocab Focus Mr. Robinson D 307

2. Vocab Words Cnidaria Radial Symmetry Oral Surface

3. Vocab Focus Cnidaria- Phylum including sea anemones, jellyfish, corals, and their relatives L. cnida "nettle,“ or"to scratch scrape"

4. Vocab Focus Radial Symmetry- similar parts of the body are arranged and repeated around a central axis L. radius "shaft, rod; spoke of a wheel; beam of light“ + L. symmetria "agreement in dimensions, due proportion, arrangement"

5. Vocab Focus Oral Surface- (in a cnidarian) surface where the mouth is L. oralis "mouth, opening, face, entrance“ + French surface "outermost boundary of anything, outside part"

6. Vocab Words Aboral Surface Tentacles Nematocysts

7. Vocab Focus Aboral surface- (in a cnidarian) surface opposite of that containing mouth Latin ab-, ab "off, away from,“ + L. oralis "mouth, opening, face, entrance“

8. Vocab Focus Tentacles- slender, finger-like extensions used to capture and handle food L. tentaculum "feeler"

9. Vocab Focus Nematocysts- unique stinging structures found within specialized cells in the tentacles (cnidocytes) Greek nema "thread" + nein "to spin"

10. Vocab Words Polyp Medusa Planula Mesoglea

11. Vocab Focus Polyp- a sac-like attached stage with the mouth and tentacles oriented upward Gk. polypos "octopus, cuttlefish"

12. Vocab Focus Medusa- bell-like upside down polyp adapted for swimming Gk. Medousa "guardian“ "jellyfish," 1758, as genus name, from the name of one of the three Gorgons with snakes for hair, whose glance turned to stone him who looked upon it

13. Vocab Focus Planula- characteristic larva of most cnidarians; a cylindrical, ciliated stage consisting of two layers of cells L. planus “flat”

14. Vocab Focus Mesoglea- narrow gelatinous middle layer in cnidarian body wall that doesn't contain cells Gk. Mesos "middle, in the middle; middling, moderate; between"