Animals as a Living System

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Across
  1. 2. How an animal acts
  2. 4. Line the intestine to give it more surface area
  3. 8. System responsible for gas exchanges
  4. 11. The variable that you change
  5. 13. System responsible for removing excess waste from the body
  6. 14. Gives an animal something positive
  7. 16. Gives an animal something negative
  8. 17. Gives an animal an outer shell of support and protection
Down
  1. 1. System responsible for transporting blood and nutrients
  2. 3. Receptors that use touch, taste, hearing, vision, and smell
  3. 5. The variable that changes because of something else
  4. 6. How the animal reacts to a stimulus
  5. 7. What the animal responds to
  6. 9. Gives an animal structure and support, minimal protection
  7. 10. The skin, eyes, tongue, nose, and ears are examples of this
  8. 12. The more you have, the more can be absorbed
  9. 15. System responsible for breaking down and absorbing nutrients