Unit 12 Crossword

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Across
  1. 4. Nerve cell specialized for crying signals from one art of the body to another
  2. 6. heart chamber that pumps blood away from heart
  3. 7. Relaxation phase in circulation
  4. 9. Central nervous system, brain and spinal cord
  5. 10. iron deficiency
  6. 13. where digestive and respiratory systems meet
  7. 14. Purges the blood of so much CO2 that the brain stops sending messages to the diaphragm
  8. 15. consists of 4 polypeptide chains, heme, and iron
  9. 17. prevents back flow of blood
  10. 18. Carries blood towards heart
  11. 19. SA node, sets tempo of heart beat
  12. 20. Circuit that carries blood between hear and the rest of the body
  13. 21. voice box
  14. 22. contraction phase in circulation
  15. 23. Communication line made from bundles of neuron fibers wrapped in connective tissue
  16. 24. Carrying inputs from sense organs to CNS
  17. 25. heart chamber that receives blood
  18. 27. SmallER branches that lead to each lung
Down
  1. 1. the amount of chambers a bird and mammal heart has
  2. 2. wind pipe
  3. 3. interpreting the sensory signals and creating a response
  4. 5. Peripheral nervous system, nerves that carry impulse in and out of the CNS
  5. 7. Sheet of muscle used in respiration
  6. 8. this is the type of circulatory system that is used in invertebrates, mollusks, and arthropods
  7. 9. Allows for diffusion between blood and tissue cells
  8. 11. (adrenaline) hormone released during stress
  9. 12. Carries blood away from heart
  10. 16. Delays contractions to ensure the artery has been completely emptied
  11. 19. Circuit that carries blood between heart and lungs
  12. 26. Clusters of air sacs
  13. 27. Leads to each lung