Respiratory System

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Across
  1. 4. tiny branches in with the bronchus divides
  2. 6. little hairlike organelles
  3. 7. muscle that helps us breathe
  4. 8. when air leave the lungs
  5. 9. tiny air sacs in the lung where gas exchange occurs
Down
  1. 1. sticky substance that helps trap particles and microbes
  2. 2. wind pipe
  3. 3. when oxygen enters the lungs
  4. 5. blood cell cells responsible for carrying oxygen