Animal adaptation

12345678910111213
Across
  1. 4. a thing made up of a number of parts joined together in a certain way
  2. 6. an internal organ that some kinds of animals
  3. 7. the process when food or drink are broken down into smaller parts
  4. 9. being the only one of a particular type
  5. 10. relating to a person’s manner of behaving or acting
  6. 12. is something that has do with the body and its systems
  7. 13. the process when an animal or plant becomes fitted to its surroundings.
Down
  1. 1. all alone
  2. 2. very dry
  3. 3. to push or drive onward
  4. 5. how the body maintains its internal temperature
  5. 8. shine with a faint
  6. 11. very great in size