CH11-Animal Structure and Function

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Across
  1. 3. the neurons of most animals are bundled together into larger structures called ___
  2. 9. a blood-like fluid found in animals with open circulatory systems
  3. 10. bones of an endoskeleton are held together by tough bands of tissue called ___
  4. 14. tiny vessels in circulatory systems that connect arteries and veins
  5. 18. an organism that has bacteria or protists living in its gut to break down wood
  6. 19. what invertebrates use to collect and expel waste
  7. 20. an organ that aids in digestion and absorbing nutrients
  8. 25. what kind of digestive system does an animal have if it takes in food and expels undigested waste through the same opening
  9. 29. special cells that collect information and carry nerve impulses
  10. 30. animals that eat dead animals
  11. 31. an animal with a closed circulatory system uses a muscular ___ to pump blood through closed ___
Down
  1. 1. a branching network of tubes used for respiration
  2. 2. this system transports nutrients and gases throughout an animal's body
  3. 4. jellyfish have a ___ skeleton
  4. 5. this type of digestion uses structures to crush and grind food into small particles
  5. 6. scissor-like mouth parts that insects use for eating plant material
  6. 7. this simple nervous system allows an animal to have a limited ability for control and response in its environment
  7. 8. tiny openings found along the sides of most insects
  8. 11. veins carry blood toward the heart, while ___ carry blood away from the heart
  9. 12. animals caught and eaten by other animals
  10. 13. an animal that feeds on plants
  11. 15. these structures allow a bird's lungs to receive fresh oxygen when it breathes in and out
  12. 16. some vertebrates have no lungs and respire completely through their ___
  13. 17. an organism that cannot move from place to place is described as ___
  14. 18. fish are vertebrates that have ___ hearts
  15. 21. if an ___ becomes too hot or too cold, it may move to another location
  16. 22. these animals obtain energy by filtering microscopic particles from the water
  17. 23. a muscular organ for mechanical digestion found in earthworms and birds
  18. 24. threadlike structures that increase the surface area of gills
  19. 26. skeletal muscles only ___ the skeleton; they never push
  20. 27. this type of support system also acts as a reserve of important minerals
  21. 28. a muscle use by mammals to draw air into the lungs