Respiratory system

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Across
  1. 3. Dome shaped muscle that controls the contractions within your lungs
  2. 4. Opening in the nasal cavity to allow air in
  3. 7. Gas all living things need
  4. 8. Disease in the lungs that causes wheezing shortness of breath and chest tightness
Down
  1. 1. The exhaling of air
  2. 2. Curved bone in your chest
  3. 5. The act of inhaling oxygen
  4. 6. Pinkish gray organs in your chest in which oxygen is in