Animal crossword

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Across
  1. 2. cold-blooded
  2. 4. asexual reproduction
  3. 7. supportive external covering
  4. 8. shedding
  5. 11. Lack of symmetry
  6. 14. milk production
  7. 15. female and male reproductive organs
  8. 17. Umbrella shaped
  9. 18. flexible connective tissue
  10. 20. can be divided into equal parts
  11. 21. similar parts along a central axis
Down
  1. 1. fluid-filled canals
  2. 3. internal skeleton
  3. 5. no backbone
  4. 6. seafloor
  5. 9. lay eggs on land
  6. 10. a form of cnidarian
  7. 12. gas-filled organ
  8. 13. backbone
  9. 16. warm-blooded
  10. 19. pregnant uterus