B6

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Across
  1. 1. Animal hair covering
  2. 2. Bird mouthpart
  3. 3. Reach maturity
  4. 5. Freedom from harm
  5. 8. Threat to life
  6. 9. Become different
  7. 10. Rear body part
  8. 11. Grind food
  9. 12. Inhaled air
  10. 14. Sharp curved nail
  11. 15. Move food inward
  12. 17. Fish breathing organs
Down
  1. 1. Bird covering
  2. 4. Flight structure
  3. 5. Stay alive
  4. 6. Swimming structure
  5. 7. Defend from harm
  6. 8. Break down food
  7. 13. Pulse rhythm
  8. 16. Air breathing organs