respiratory system

12345678910
Across
  1. 3. holds the lungs in place
  2. 6. several groups of muscles to form the lungs wall
  3. 8. the main air way to the lungs
  4. 9. connects the trachea to the lungs
  5. 10. connects mouth and nose to esophagus
Down
  1. 1. there are two of them
  2. 2. the name outer membrane
  3. 4. where air first goes through
  4. 5. delicate membrane that covers the lungs surface
  5. 7. protects the lungs