Unit 4 CWP 1

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