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BIO202-CH22-Lung-Ple

BIO202 - Ch 22 - Lungs, Pleurae - Marieb/Hoehn - RioSalado - AZ

QuestionAnswer
Site where conducting zone structures give way to respiratory zone structures. Bronchial tree
The divisons of the trachea at T7 are? R & L main (primary) bronchi
The __ main bronchus is wider, shorter, & more vertical & is common site for inhaled foreign object to lodge. right
Tree subdivisions off main bronchus continue as? Bronchus, lobar bronchi, segmental (teritary) bronchi, bronchioles (1mm), terminal bronchioles (0.5 mm).
As conducting tubes become smaller __. (1) cartilage rings change to plates, (2) epithelium change from ciliated to cuboidal, (3) amount of sm. muscle increases.
Respiratory zone begins where? As terminal bronchioles feed into respiratory bronchioles, from which protrude the alveoli.
Walls of alveoli are composed of __. Type I cells - single layer of squamous epithelial cells & Type II cells - cubodial that secrete surfacant.
__ crawl freely along internal alveolar surfaces. Alveolar macrophages
The narrow superor tip of lung is the __ & inferior that rests on diaphragm is the __. apex/base.
Why do the 2 lungs differ in size? Left lung is smaller due to the cardiac notch that accomadates the heart.
Bronchopulmonary segments Pyramid-shaped segments of lobe that are separated from one another - Each starts w/10 & disease confined to one or a few segments - can be removed w/o damaging nearby segments.
Smallest subdivisions of lungs visible to naked eye. Lobules - hexagons about size of pencil eraser.
The rest of lung tissue, or stroma, is mostly __. elastic CT
The __ provide blood to lung tissue. bronchial arteries
What are the pleurae? Thin, double-layered serosa - parietal & visceral
The left lung has __ lobes while the right lung has __. 2, 3
Intrapulmonary pressure the pressure inside all alveoli is the same as that of outside air.
The __ help divide the thoracic cavity into the mediastinum, & lateral pleural compartments. The pleurae - also limits spread of local infections.
Pleurisy Inflammation of the pleurae - pleural effusion can result.
Pleural effusion Fluid accumulation in pleural cavity
Created by: Ladystorm
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