Animal Crossword Puzzle Creation

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Across
  1. 2. Coldblooded body temperature depends on environment
  2. 3. Has both male and female reproductive organs
  3. 4. Free-swimming, bell-shaped body form (like jellyfish)
  4. 5. Fluid-filled system in echinoderms used for movement and feeding
  5. 7. Left and right sides are mirror images
  6. 8. No regular body shape or pattern
  7. 9. Flexible, rubbery tissue (softer than bone)
  8. 13. Gas-filled organ that helps fish control buoyancy
  9. 15. Sessile (attached), tube-shaped body form (like coral)
  10. 16. Organ that nourishes a developing baby inside the mother
  11. 18. Warmblooded maintains body temperature internally
  12. 20. Internal skeleton inside the body
Down
  1. 1. Animal without a backbone
  2. 4. Shedding an exoskeleton to grow
  3. 6. Animal with a backbone
  4. 10. Eggs with a protective shell and membranes (can survive on land)
  5. 11. Hard outer covering that supports and protects the body
  6. 12. Organs that produce milk for feeding young
  7. 14. Body parts arranged around a central point (like a starfish)
  8. 17. Asexual reproduction where a new organism grows off the parent
  9. 19. Living on or near the bottom of a body of water