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Respiratory System (lung capacity & volume (dead space volume (air…
Respiratory System
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disorders
COPD
chronic obstructive pulmonary disease, labored breathing progressively worsens
Lung Cancer
associated with smoking, 1/3 of cancer deaths in US
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Seasonal Flu
viral infection that changes every year, severe cold symptoms
Tuberculosis
contagious bacterial infection, cough with thick mucus, swollen lymph nodes
Emphysema
alveoli enlarge as adjacent chambers break through, over-inflation, airways collapse during expiration
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Chronic Bronchitis
mucosa becomes inflamed, mucus production increases which impairs ventilation & gas exchange
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organs
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trachea
connects larynx w/ bronchi, lined with ciliated mucosa
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major functions
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purify, warm, & humidify incoming air
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breathing mechanism
pulmonary ventilation
movement of air in lungs, depends on pressure gradient
before inspiration pressure in lungs: pL= pressure of atmosphere, pA= 760mmHg
respiration
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happens in mitochondrion, oxygen carried as oxyhemoglobin in blood
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