Respiratory system

123456789101112131415
Across
  1. 2. this is a muscular organ between the pharynx and trachea
  2. 5. are pipes that carry oxygen-rich air to your lungs
  3. 8. these tubes end in bunches of tiny round air sacs
  4. 9. are the main organs of the respiratory system
  5. 10. it is a chamber where the passages from the nose and mouth meet.
  6. 11. are tiny air sacs
  7. 12. is a waste gas
  8. 14. deliver blood rich in carbon dioxide
  9. 15. pumps the oxygen-rich blood out the body
Down
  1. 1. also filters the air we breathe and branches into the bronchi
  2. 3. this is where the air first enters our body
  3. 4. mesh of tiny blood vessels that cover the air sacs
  4. 6. are two air tubes that branch off of the trachea
  5. 7. is a group of organs and tissues working together to enable us to breathe
  6. 13. is a muscular structure located between the thoracic and abdominal cavity