Circulation, Respiration, and Nervous

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Across
  1. 4. Contraction Phase
  2. 5. Layers of Connective Tissue for Protection
  3. 9. Master Control Center
  4. 10. Adrenaline
  5. 14. Chain of beadlike Supporting Cells (2 words)
  6. 17. Red Blood Cells
  7. 21. Heart Chamber that Receives Blood
  8. 22. Low Blood Pressure
  9. 24. Alveoli Disinegration
  10. 26. Branches atthe end of the Trachea
  11. 27. Digestive and Respiratory Meeting Point
  12. 29. Nucleus and other Organelles (2 words)
Down
  1. 1. Nerve Cell specialized for carrying Signals
  2. 2. 4 Polypeptide Chains, Heme, and Iron
  3. 3. Heart Chamber that Pumps Blood
  4. 6. Windpipe
  5. 7. Central Nervous System
  6. 8. Anything that causes a Nerve Signal to Start
  7. 11. High Blood Pressure
  8. 12. White Blood Cells
  9. 13. Peripheral Nervous System
  10. 15. Branches at the end of the Bronci
  11. 16. Voice Box
  12. 18. Relay Point between Cells
  13. 19. Clusters of Air Sacs
  14. 20. Sheet of Muscle
  15. 23. Cardiopulmonary Resuscitation
  16. 25. Long, Single Fiber
  17. 28. Iron Deficiency
  18. 30. Relaxation Phase