Respiratory System

2. This is the cavity the lungs are located in.
4. Tension on the true vocal cords controls the _____ of sound.
6. Terminal bronchiole subdivide into respiratory __________.
8. The exchange of gases between the lungs and blood.
11. This muscle moves downward when it contracts for breathing.
13. What are the anterior portions of the nasal cavities, just inside the nostrils called?
15. The respiratory system works together with the __________ system to aupply oxygen and eliminate carbon dioxide.
16. As we age, lung tissue becomes less elastic and more ______.
19. What stimuli detects the sense of smell?
21. This separates the right and left nasal cavities.
22. Paired, cone-shaped organs located in the pleural cavity

1. A passageway that extends from the cricoid cartilage to the fifth thoracic vertebra.
3. What structure is between the pharynx and the trachea?
5. The three unpaired pieces of cartilage in the larynx are: Thyroid, epiglottis and the ______.
7. what is the upper most part of the pharynx called?
9. Grapelike outpouchings of epithelium and elastic basement membrane surrounded by a network of capillaries.
10. Functional residual _____ is the volume of gas in the lungs at the end of a normal tidal volume exhalation.
12. What is another name of alveolar ducts?
14. What does alveolar cells secrete?
17. This cell in the trachea produces mucus.
18. The primary bronchi divide to form these smaller bronchi.
20. opening in the oropharynx that connect with the mouth