Animal crossword

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Across
  1. 3. Glands Milk-producing glands
  2. 4. Bottom-dwelling
  3. 6. Possessing a backbone
  4. 8. Asexual reproduction by outgrowth
  5. 10. Internal skeleton
  6. 13. Warm-blooded
  7. 15. To shed an exoskeleton
  8. 16. Flexible connective tissue
  9. 17. Organ connecting mother and fetus
  10. 19. Eggs Eggs with a protective membrane
  11. 20. Lacking a backbone
Down
  1. 1. Possessing both male and female reproductive organs
  2. 2. Vascular System Hydraulic system in echinoderms
  3. 5. Free-swimming, bell-shaped cnidarian body form
  4. 7. Lack of symmetry
  5. 9. Cold-blooded
  6. 11. Bladder Gas-filled sac for buoyancy control
  7. 12. Sessile, cylindrical cnidarian body form
  8. 13. External skeleton
  9. 14. Symmetry Symmetry around a central axis
  10. 18. Symmetry Symmetry down a central plane