Across
- 3. Lack of a balanced body pattern
- 5. A system of fluid filled canals
- 8. The shedding of a Exoskeleton
- 9. Body parts arranged around a central axis
- 12. a new organism or plant develops as an outgrowth
- 14. An internal skeleton
- 15. Animals that regulate their body temperature
- 17. Body parts arranged in two equal halves
- 19. Organisms living on or in the bottom of water bodies
- 21. Animals with a backbone and internal skeleton
Down
- 1. Animals without a backbone
- 2. A hard external covering that protects and supports
- 4. An animal producing both sperm and eggs
- 6. Eggs designed for terrestrial life
- 7. Usually asexual
- 10. A gas filled organ
- 11. Animals that rely on external environments for body temperature
- 13. connects the developing fetus to the uterine wall
- 16. A flexible connective tissue
- 18. Umbrella shaped stage of cnidarians
- 20. organs that mammals produce milk to feed their young