Respiratory System Review

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Across
  1. 3. two organs of respiration
  2. 5. waste product delivered to the alveoli for exhalation
  3. 7. gas exchanged between capillary and alveoli, making the blood "red"
  4. 9. flap of cartilage that covers the voice box when swallowing
  5. 10. main muscle of breathing
  6. 12. windpipe
Down
  1. 1. microscopic structures in lung where gas is exchanged
  2. 2. extensions off of the trachea that carry air into the lungs
  3. 4. voice box
  4. 6. to breathe in
  5. 8. to breathe out
  6. 11. throat