Respiratory system

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Across
  1. 3. connects nasal cavity to larynx
  2. 5. windpipe
  3. 7. Dry air consists of 78.08% __________
  4. 8. air sacs
  5. 10. air comes in and out
Down
  1. 1. skeletal muscle that sits between the ribs
  2. 2. the air that enters the lungs
  3. 4. muscles between the ribs
  4. 6. when breathing in, the diaphragm and intercostal muscles __________
  5. 9. Two identical organ found in the chest