Vertebrates and Invertebrates

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Across
  1. 2. of an echinoderm. Starfish
  2. 4. with feathers. Birds
  3. 6. with a skeleton. Vertebrates
  4. 8. with dry,scaly skin. Reptiles
  5. 10. that uses it's skin and lungs to Frog
  6. 11. without a skeleton. Invertebrates
Down
  1. 1. with gills. Fish
  2. 3. that live in water and on land. Amphibians
  3. 5. mollusc with a shell. Snail
  4. 6. of an annelid. Earthworm
  5. 7. with lots of legs. Arthropods
  6. 9. that feed on milk. Mammals