Invertebrate Terms

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Across
  1. 7. Roundworms
  2. 10. Skeleton, A fluid-filled cavity that provides support and allows for movement
  3. 12. Having no moral backbone
  4. 13. Largest phylum of invertebrates
  5. 14. Marine Invertebrates
  6. 16. single-celled organisms
  7. 18. Flatworms
  8. 19. Body, A body divided into repeated units
Down
  1. 1. A tough flexible polysaccharide
  2. 2. clade, group of invertebrates that share ancestors
  3. 3. soft-bodied invertebrates
  4. 4. earthworm
  5. 5. Appendages, Limbs with joints
  6. 6. A major group or division within the animal kingdom
  7. 8. Segmented worms
  8. 9. Small, aquatic invertebrates
  9. 11. Arrowworm
  10. 14. Hard eternal covering that protects the body
  11. 15. Symmetrical, Having body parts arranged around a central axis
  12. 17. Symmetry, Having a left and right side that are mirror images of each other