A&P Lab Ch 21
Bronchioles
passages in the respiratory tract smaller than 1 mm in diameter
Muscularis
not a layer of tissue in the respiratory tract
Proper order of respiratory tract
1. nasal cavity 2. nasopharynx 3. oropharynx 4. laryngopharynx 5. larynx 6. trachea 7. bronchi 8. bronchiole 9. terminal bronchiole 10. respiratory bronchiole 11. alveolar sac
3 structures that constitute the respiratory membrane
1. squamous epithelial 2. endothelial cells of pulmonary arteries 3. shared basal lamina
3 trends we find within the respiratory tract
1. the epithelium gets progressively shorter in the lower passages 2. the amount of smooth muscle increases in the smaller passages 3. the amount of elastic fibers increases in the smaller passages
Respiratory Zone
gas exchange takes place
The ____ is the lungs' outer membrane, which adheres to the inner wall of the thoracic cavity.
parietal pleura
Conducting Zone
passage that conducts air to lower passages
Between the two layers of membrane is the ___.
pleural cavity
Epiglottis
the piece of elastic cartilage that seals off the larynx during swallowing
At the lungs' root, it folds inward on itself to become the inner membrane called the ____, which adheres to the lungs' surface.
visceral pleura