Across
- 5. inner layer of cells in gastrula (digestive system)
- 8. animals such as a mantis or crab have a hard OUTER shell called the...
- 9. outer layer of cells in gastrula (skin & nervous system)
- 10. animals such as a cow or wolf (with a spine)
- 11. head end
- 12. a fertilized egg cell
- 14. animals such as a jellyfish or starfish (without a spine)
- 15. a fluid filled ball of cells
Down
- 1. middle layer of cells in gastrula (muscular/circulatory/respiratory
- 2. balance among body structures of organisms
- 3. animals such as a cat or chipmunk have an internal structure that protects muscles and internal organs called the...
- 4. tail end
- 6. underside (belly)
- 7. backside (spine)
- 13. 2 layer sac with an opening at one end