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respiratory system (anatomy of respiratory tract (lungs (occupy most of…

- - - - beat continuously in opposite direction of incoming air
      - mucus loaded with dust and other bedrid away from lungs
  - - - moistens air
      - traps incoming foreign particles
  - - - frontal, sphenoid, ethmoid,maxillary one
      - lighten the skull, resonance chambers for speech
      - produce mucus
  - - - nasopharynx
        
        superior region behind nasal cavity
      - oropharynx
        
        middle region behind mouth
      - laryngopharynx
        
        inferior region attached to larynx
- - - - squamous cell cericoma
      - admoricarcoma
      - small cell carcinoma
  - - - nuerosecretion of thick mucus days system.
- - - - moving Air in and out of the lungs
    - - exchange of gases between blood and body cells
  - - - diaphragm and rub muscles relax elastic recoil of stretched elastic fibers lungs and lung volume and pressure, forcing air out of the lungs
  - - - scalene muscles; sternocleidomastoid and pectorals minor
- - - - tidal volume + inspiratory reserve volume
    - - residual volume + expiratory reserve volume
    - - inspiratory reserve volume + tidal volume + expiratory reserve volume
    - - sum of all volumes
    - - tidal volume
        
        air moved by one respiration, about 500ml, during normal breathing at rest
      - inspiratory reserve volume
        
        additional air taken in during maximal inhalation
      - expiratory reserve volume
        
        additional air expired during forced exhalation
      - residual volume
        
        amount of air left in alveoli after forced expiration, keeps them inflated
      - dead space volume
        
        air remaining in conducting zone does not reach alveoli