Respiratory System

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Across
  1. 5. The system responsible for exchanging oxygen and carbon dioxide
  2. 6. Funnel-shaped tube that connects the sinuses to the larynx
  3. 9. Division that includes the larynx, trachea, bronchi, and lungs
  4. 10. The central area between the lungs that contains the heart
  5. 12. The process of moving air in and out of the lungs
  6. 15. Division of the respiratory system that includes the nose and pharynx
  7. 18. Tiny blood vessels where gas exchange meets the circulatory system
  8. 19. Tube for air located in front of the esophagus
  9. 21. Structures that branch from the trachea into the lungs
  10. 23. The gas taken into the body for cellular respiration
Down
  1. 1. Muscles between the ribs that assist with breathing movements
  2. 2. The functional units of the lungs responsible for gas exchange
  3. 3. The “voice box” that connects the pharynx to the trachea
  4. 4. Dome-shaped muscle that contracts downward to allow inhalation
  5. 7. Muscles that help force air out during active exhalation
  6. 8. The waste gas removed from the body during exhalation
  7. 11. Primary site of gas exchange with pulmonary capillaries
  8. 13. The space in the chest cavity where the lungs are located
  9. 14. Helps regulate body fluid acidity by controlling CO₂ levels
  10. 16. Paired cone-shaped organs responsible for gas exchange
  11. 17. Normal, relaxed breathing at rest that primarily uses the diaphragm
  12. 20. Forceful breathing during exercise that recruits accessory muscles like the abdominals and intercostals
  13. 22. The uppermost part of the respiratory airway where air enters the body