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