Respiratory System

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Across
  1. 3. Tiny hairs
  2. 5. Thick fluid in sinuses
  3. 7. Used for breathing
  4. 10. Let out air
  5. 11. Element necessary for respiration
Down
  1. 1. Vessels back to the
  2. 2. Protects lungs and heart
  3. 4. Windpipe
  4. 6. Carries out oxygen to the rest of the body
  5. 8. Lung with three lobes
  6. 9. Element of living things