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HeardSarah - Respiratory (Disorders (lung cancer (1/3 of all cancer deaths…
HeardSarah - Respiratory
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Major functions
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passageways to lungs purify, warm, and humidify incoming air
Disorders
lung cancer
1/3 of all cancer deaths in US; associated with smoking; 3 common types- squamous cell carcinoma, adenocarcinoma, small cell carcinoma
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chronic bronchitis
mucosa becomes inflamed; mucus production increases; pooled mucus impairs ventilation and gas exchange; risk of lung infection increases
asthma
chronic inflamed hypersensitive bronchiole passages; response to irritants with dyspnea, coughing, and wheezing
emphesma
alveoli enlarges as adjacent chambers break through; chronic inflammation promotes lung fibrosis; airways collapse during expiration; overinflation causes barrel chest; blue skin due to lack of oxygen
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