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Respiratory System (LUNG CAPACITY TERMINOLOGY (Inspiration reserve volume,…

- - - - air enters though external naves (nostrils)
      - divided by the nasal septum
    - - olfactory receptors
      - lined with respiratory mucosa
        
        moistens air
        
        traps incoming foreign particles
      - lateral walls have conchae
        
        increases surface area
        
        increases air turbulence
    - - cavities with bones
        
        frontal, sphenoid, ethmoid,maxillary bone
        
        lighten skull
        
        resonace chambers for speech
        
        produce mucus
    - - muscular passage from nasal cavity to larynx
        
        nasopharynx
        
        behind nasal cavity (air only)
        
        oropharynx
        
        middle region (behind mouth)
        
        air and food
        
        laryngopharynx
        
        attached to larynx
        
        air and food
  - - - Connects larynx and bronchi
      - C-shaped rings made of hyaline cartilage to keep airway open at all times
      - lined with ciliated mucosa
    - - formed by division of trachea
      - subdivide into smaller and smaller branches
    - - occupy most of thoracic cavity
      - apex is near clavicle
      - base rest on diaphragm
      - divided by fissures
- - - - 1 fissure
      - 2 lobes
        
        no room for 3rd lobe because of heart
    - - longer because of the presence of the heart on the left side
  - - - 2 fissues
      - 3 lobes
      - most air enters thing lung because it is the first one
    - - wider, shorter, and straighter than left
- - - - exchange of gases between blood and body cells
    - - in mitochondria
      - oxygen is carried into blood (oxyhemoglobin)
  - - - Inspiration
        
        flow of air into lungs
        
        increase of volume in lungs and decrease in pressure
        
        diaphragm moves down, ribs up, sternum forward
      - Expiration
        
        air leaving lungs
        
        decrease in volume and increase in pressure
        
        contraction of intercostal (ribs) muscles and abdominal muscles