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Pulmonary system (chest wall + pleura (pleura (visceral pleura (covering…

- - - - covering lungs
    - - lining thoratic cavity
    - - space between two pleural
    - - keep lungs from collapsing + moving away from chest wall
- - - - 1 of two main air pathways to each lung
    - - little bronchi = airflow to and from environment + control airflow = dilating + constricting
    - - supported by C - shaped cartilage + connect larynx + bronchi
    - - connect laryngopharynx + trachea = junction b/t upper + lower resp tracts
    - - lined with ciliated mucous = mucous secreting = move mucous across surface + warm + humidifies air = remove particles
  - - - cleaning resp system
- - - - remove clots + air + other debries
  - - - alerteration to membrane = emphisima = impact gas exchange
  - - - conducting zone cells
      - large pulmonary vessels
      - pleurae = membrane around lungs
        
        some empty into pulmanory vein = normal venous mix of oxygenated + unoxygenated blood
        
        not all drain into bronical venous return system
- - - - Middle lobe
      - Lower lobe
      - Upper lobe
    - - Upper lobe
      - Lower lobe
      - Smaller due to heart apex
    - - protected by lung tissue
  - - - heart
      - great vessels
      - oesophagus
  - - - sites of gas exchange
        
        lungs
- - - - branch from terminal bronchials + fewer ciliated / mucus producing cells + epithelial cells = gas exchange
    - - distal to resp bronchials + some gas exchange
    - - primary gas exchange unit
      - O2 enters blood + CO2 removed
      - approx. 0.2 mm diamiter + 300 million in adult lung
      - septa
        
        allow some movement pass through
        
        membrane b/t two cavities
        
        alveolus to alveolus
        
        promote collateral ventilation