Vital Functions--Fish

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Across
  1. 3. Fins that work like our arms are _____.
  2. 5. For _____, they lay eggs in water.
  3. 6. For protection, their bodies are covered in
  4. 8. _____ fins are singular fins found on the fish's
  5. 9. For movement, fish have modified _____ that help them swim.
Down
  1. 1. Their hearts are divided into two _____.
  2. 2. Fish use gills under water for _____.
  3. 4. For support, fish have an _____ skeleton made of
  4. 7. Some of their fins are used in _____, but others are