Animal Parts and How They Function

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Across
  1. 3. serving for or pertaining to digestion.
  2. 5. something that pursues a winding, usually upward, course or that displays a twisting form or shape
  3. 7. The system that circulates blood through the body, consisting of the heart and blood vessels
  4. 9. situated or existing in the interior of something
  5. 10. to show or exhibit; make visible
Down
  1. 1. of or relating to the outside or outer part
  2. 2. pertaining to or serving for respiration
  3. 4. easy to see through
  4. 6. behavior in animals that occurs before and during mating, often including elaborate displays.
  5. 8. easily bent