Animal Kingdom-Animal Classification

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Across
  1. 3. A flexible rod found in chordate animals
  2. 8. The effort to define the boundaries between the various created kinds of animals
  3. 10. Type of gut where the digestive tract has 2 openings
  4. 11. Where an object can be divided by one or more imaginary lines into mirror-image halves
  5. 14. Animals that never have a notochord or bony vertebrate
  6. 15. Animals that can regulate their internal temperatures
  7. 18. The type of cells that all animals have
Down
  1. 1. Type of gut where the digestive tract has one opening
  2. 2. Animals that have a notochord anytime during its life
  3. 4. The lack of mirror image halves
  4. 5. Scientist that studies animals
  5. 6. Animals that depend on the environment to regulate their body temperatures
  6. 7. Animals with vertebrae that protects the spinal cord
  7. 9. The digestive tract or part of the body that takes in food, digests it and absorbs it
  8. 12. Symmetry where there is more than one possible imaginary lines to divide into mirror halves
  9. 13. Where most animals have their sense organs and brains clustered at one end of the body
  10. 16. Symmetry where the midline divides the object into two halves
  11. 17. A hollow within the body that has vital organs