Across
- 1. Phylum of flatworms
- 2. Animals with two germ layers
- 6. Phylum that includes vertebrates
- 11. Internal supporting structure
- 13. Phylum with jointed appendages
- 15. Phylum with spiny-skinned animals
- 16. Animals with backbone
- 17. Animals without body cavity
- 19. Phylum of sponges
- 20. Excretory organ in annelids
Down
- 1. Animals with false body cavity
- 3. Animals without backbone
- 4. Animals with three germ layers
- 5. Supporting rod in chordates
- 7. Phylum of segmented worms
- 8. Phylum of soft-bodied animals
- 9. Symmetry seen in starfish
- 10. Symmetry seen in humans
- 12. Body-supporting structure found outside the body
- 14. Fluid-filled body cavity
- 18. Phylum of jellyfish and hydra