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Respiratory System (anatomy of respiratory tract (trachea, primary branchi…
Respiratory System
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breathing mechanism
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expiration- passive process, diaphragm and ribs relax
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control of respiration- respiration center- several groups of neurons in medusa oblongata & pons; control rate and depth of breathing
Physical factors- increased body temperature, exercise, talking, coughing, and emotions
chemical factors- increase CO2 and decrease respiration, acts directly on medulla oblongata
disorders
COPD- hard time breathing, coughing and frequent pulmonary infection, hypoxic, respiratory failure, causes of death and disability
Emphysema- alveoli enlarge as adjacent chambers break through, inflammation, lung fibrosis, airways collapse during expiration, barrel chest, cyanosis
chronic bronchitis -mucosa becomes inflamed, mucus production increases, pooled mucus impairs ventilation and gas exchange, lung infection, pneumonia
lung cancer- associated with smoking, cause death
sudden infant death- unexplained infant death, due to neural respiratory control center or abnormal heart rhythm
Ashtma- inflamed hypersensitive bronchiole passages, response to irritants with depend, coughing, and wheezing
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