Animal kingdoms

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Across
  1. 5. vertebrates
  2. 7. breathe thong gills
  3. 8. skeleton made of cartilage
  4. 9. dry and scale skin
  5. 10. roundworms
Down
  1. 1. jawless fish
  2. 2. largest animal phylum
  3. 3. members of the second largest phylum
  4. 4. bony fish
  5. 6. flatworms