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Stack #164802
Question | Answer |
---|---|
consists of the nasal cavities, paranasal sinuses, nasopharynx, oropharynx, and hypopharynx (epiglottis and larynx). | Upper airway |
Functionally these areas serve to warm the inspired air and to filter large particulate matter. | Upper airway |
consist of the trachea and its bronchial branches. | Lower airway |
Where does the trachea branches into the mainstem bronchi | at the carnia |
Communication between adjacent alveolar spaces is provided by | the pores of Kohn. |
represents the functional gas exchange area of the lung | acinus |
composed of a respiratory bronchiole and its branching structures. | acinus |
smallest discrete portion of lung bounded by fibrous septa a | larger lobule |
consists of a terminal bronchiole and its branching structures | larger lobule |
A lobule may contain _________ acini. | 25-30 |
The pulmonary and bronchial arteries follow the | airways |
The pulmonary veins follow a course through | connective tissue septa |
Lymphatic channels are found where in the respiratory tract? | pleura and connective tissue septa and extend down the tracheobronchial tree to the level of the terminal bronchiole. |
Peripheral lymphatics drain to the | hilar and paratracheal lymph nodes. |
Large particulate matter > 10μ in size is filtered by | nasal hairs or trapped in the oropharynx. |
Smaller particles are trapped in the rich in | bronchial mucous blanket or the bronchiolar watery secretions |
What are bronchial mucous blanket & bronchiolar watery secretions made of? | lysozyme and secretory IgA. |
Particles that are 1-5μ in size are accessible to the terminal airways and alveoli where they are | phagocytized by the alveolar macrophages. |
How are the small 1-5u particles disposed of by the macrophages? | migrate up the tracheobronchial tree or enter the interstitial space where they eventually can be carried off by lymphatics. |
refers to the movement and distribution of air within the tracheobronchial system | Ventilation |
the movement of O2 and CO2 between the alveolar space and the capillary blood; | diffusion |
refers to the flow and distribution of blood within the pulmonary vascular bed | perfusion |