The Respiratory System Crossword

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Across
  1. 3. lymphoid tissue at the back of the throat; composed of lymphocytes and help fight infection
  2. 4. having an insufficient oxygen supply
  3. 6. a muscle that separates the thoracic cavity from the abdomen ; domes upward when resting and flattens out when inhaling to allow more room for oxygen
  4. 8. the only externally visible part of the respiratory system
  5. 13. flap of tissue that covers the entrance to the windpipe when swallowing
  6. 14. the number of lobes in the right lung
  7. 15. also known as the voice box; helps us to speak
  8. 17. a large, air filled space above and behind the nose in the middle of the face; each cavity is the continuation of the two nostrils
  9. 20. the amount of air moved during normal, quiet breathing
Down
  1. 1. the opening between the vocal cords in the larynx
  2. 2. oxygen and carbon dioxide are exchanged in the lungs and all cell membranes by this process
  3. 5. inflammation of the bronchial membranes
  4. 7. also known as the windpipe; runs from the base of throat to lungs
  5. 9. labored or difficult breathing
  6. 10. the lung volume that represents the total volume of exchangeable air
  7. 11. air sacs in the lungs where blood and gas exchange occur; grapelike sacs
  8. 12. your throat; starts at the back of your nose and stops at the top of the larynx
  9. 16. the amount of gas that stays in the lungs after we forcefully exhale; keeps our lungs from collapsing (the abbreviation)
  10. 18. a disease of the bronchi characterized by wheezing, dyspnea, and a feeling of constriction in the chest
  11. 19. the number of lobes in the left lung