BMS 420 Lecture Notes - External Intercostal Muscles, Perfusion, Pulmonary Circulation
Document Summary
P: gas pressure or partial pressure (mmhg) torr, mmhg, cmh2o. Pco2: partial pressure of co2(in gas or liquid [does not specify arterial or venous]) Po2: partial pressure of o2 (in gas or liquid [does not specify arterial or venous]) Anatomy of the respiratory system quick review. Right lung with 3 lobes and left lung with 2 lobes. Alveolar spaces are responsible for majority of the 4 liters or so lung volume. Alveolar spaces separated by interstitium with collagen and potential space for fluids and cells. Visceral pleura: thin membrane covering outside of lungs. Parietal pleura: thin membrane lining lungs and diaphragm. Pleural cavity: space between the two membranes and important in ventilation. Bronchi: cartilage, diameter - > 1 mm, epithelium pseudostratified/columnar, blood supply bronchial, no alveoli. Terminal bronchioles: no cartilage, diameter - <1 mm, epithelium cuboidal, blood supply bronchial, no alveoli. Respiratory bronchioles: no cartilage, diameter - <1 mm, epithelium cuboidal, blood supply pulmonary, alveoli.
