Across
- 2. symmetrical
- 5. Symmetry- Symmetry around a central Axis
- 6. Having a back bone
- 8. on environment heat
- 9. Glands-Responsible for lactation
- 16. skeleton
- 18. Symmetry-organisms with shapes that are mirror images alone the saggital line
- 19. No back bone
- 20. oxygen and nutrients to baby
- 21. covering in some invertebrates
Down
- 1. to the bottom of a body of water
- 3. Bladder-Maintains water depth
- 4. on internal heat generation
- 7. How sponges sexually reproduce
- 10. shaped cnidarian
- 11. Vascular System-Network of water vessels in body
- 12. & is generally asexual
- 13. reproduction
- 14. Eggs-Air breathing egg
- 15. shed of a animal
- 17. Connective tissue