CROSSWORD: Circulatory, Respiratory, and Nervous Systems

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Across
  1. 3. /The function of the occipital lobe
  2. 4. /Consists of the brain and spinal cord
  3. 6. /Sheet of muscle beneath the lungs
  4. 9. /Short and branched, receives messages from cells or environment
  5. 11. /Disease causing alveoli to disintegrate
  6. 13. /Type of blood is bright red
  7. 20. /poisonous gas that binds with hemoglobin better than oxygen
  8. 22. /Communication line made of bundles of neuron fibers
  9. 23. /Heart chamber that pumps blood away from the heart
  10. 24. /The hormone that increases heart rate (adrenaline)
  11. 25. /Type of blood is dark red or blue
  12. 26. /Breathing in, contracting diaphragm
  13. 28. /Clusters of air sacs (increases surface area)
Down
  1. 1. /Single long fiber that conducts signal to effector or another neuron
  2. 2. /Relaxation phase of the heart
  3. 5. /Another name for the SA Node
  4. 7. /Consists of nerves that carry impulses in and out of CNS
  5. 8. /Largest type of the 3 blood vessels and leads away from the heart
  6. 10. /Another name for the windpipe
  7. 12. /In RBC but not WBC (iron containing protein)
  8. 14. /Prevents backflow
  9. 15. /The structure of a red blood cell (increases surface area)
  10. 16. /Branching tubes within both lungs
  11. 17. /Heart chamber that receives blood
  12. 18. /Involuntary nervous system in the PNS
  13. 19. /Specialized nerve cell for carrying signals from 1 part of the body to another
  14. 20. /Part of the brain whose function is coordination and balance
  15. 21. /Fatty chain that protects and supports the axon
  16. 24. /Breathing out, relaxing diaphragm
  17. 27. /Substance that builds up in the walls of the arteries