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Structures of Pulmonary System
Airways, Pulmonary circulation, chest wall, Lungs: Lobes (3 on right, 2 on left), Mediastinum
Upper airways: nasopharynx, oropharynx
Larynx-vocal cords: connect upper and lower airways
Lower airways: trachea, bronchi, terminal bronchioles
Respiratory bronchioles, alveolar ducts
Alveoli: epithelial cells Type 1 & 2 alveolar cells
Mechanical movement of gas or air into and out of the lungs
Minute volume-normal is 1L/min. Ventilatory rate multiplied by volume of air per breath
Alveolar ventilaion-carbonic acid leaving lungs as CO2
Major muscles of inspiration
diaphragm- flat on inspiration
external intercostals-overused in COPD (barrel chest)
accessory muscles of expiratory
When coughing they push air out
abdominal intercostal muscles
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