Upper Respiratory System Crossword

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Across
  1. 2. the respiratory helps maintain the ____ of blood
  2. 5. the bronchi are part of the ____ respiratory tract
  3. 8. these structures, part of the immune system, are found in the back of the mouth and are part of the upper respiratory system
  4. 11. account for approximately 95% of immune cells in the lungs
  5. 12. another name for the voice box
  6. 14. providing an extensive area for gas exchange between air and circulating blood
  7. 15. one function of the respiratory system is to produce enzymes that help regulate blood pressure it is called ____ converting enzyme
  8. 16. the flap of cartilage that keeps food from going into the lungs
  9. 17. as air passes through the mouth and nose, it is ____ and moistened, so that dry, cold air does not damage the delicate lungs.
Down
  1. 1. one function of the respiratory system is defending the respiratory system and other tissues from invasion by
  2. 2. one of the functions of the respiratory system is ____ respiratory surfaces from dehydration, temperature changes, or other environmental variations
  3. 3. one function of the respiratory system is to produce ____ involved in speaking, singing, and other forms of communication
  4. 4. one function of the respiratory system is facilitating the detection of ____ stimuli by receptors in the nasal cavity
  5. 6. the tonsils are part of the ____ respiratory tract
  6. 7. another name for the throat
  7. 8. if all the surfaces in the alveoli were spread out flat, they would measure between 50 and 75 square meters, about the size of half a ____ court
  8. 9. the two largest organs of the lower respiratory tract
  9. 10. these tubes connect the nasal passage with the middle ear and are part of the upper respiratory system
  10. 13. these cavities inside the head are part of the upper respiratory system and sometimes cause headaches if they get infected