Simple Invertebrates

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Across
  1. 5. are parasites; has a small head, no eyespots, suckers help to adhere to host
  2. 8. has bilateral symmetry, 3 embryonic layers, a simple nervous system, and eyespots
  3. 9. Organisms with both male and female reproductive organs
  4. 10. free-living freshwater, marine, or terrestrial in damp places
  5. 12. 2 embryonic tissue layers; has radial symmetry; can be in the form of a polyp or medusa
  6. 14. harpoon-like structure in the cnidocyte
  7. 15. no body cavity
  8. 16. a body cavity completely lined with mesoderm, filled with fluid
Down
  1. 1. stinging cell
  2. 2. grouping of nerve cells that controls a part of the body
  3. 3. Has no nervous system, no tissue
  4. 4. non-motile cnidarian body plan
  5. 6. A body cavity partially lined with mesoderm, not a true body cavity
  6. 7. Cells that use flagella to move water
  7. 11. Bilateral symmetry, 3 embryonic tissue layers,simple nervous system with ganglia, pseudocoelomate, one-way digestive tract
  8. 13. bell-shaped body and tentacles