Breathing

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  • The Mechanics of Breathing
    • Main Lung Capacitites
      • Tidal Volume (TV)
      • Inspiraory Reserve Volume (IRV)
      • Expiratory Reserve Volume (ERV)
      • Residual Volume (RV)
      • Total Lung Capacity
      • Minute Ventilation
  • Inspiration
    • The Mechanics of Breathing
      • Main Lung Capacitites
        • Tidal Volume (TV)
        • Inspiraory Reserve Volume (IRV)
        • Expiratory Reserve Volume (ERV)
        • Residual Volume (RV)
        • Total Lung Capacity
        • Minute Ventilation
    • The diaphragm muscle contracts and flattens which increases the volume inside the chest cavity or thorax
    • The lungs connected to the pleural membrane are pulled out - active process
  • The air in the lungs are at a low pressure and the air outside is at a higher pressure
    • Inspiration
      • The diaphragm muscle contracts and flattens which increases the volume inside the chest cavity or thorax
      • The lungs connected to the pleural membrane are pulled out - active process
  • The intercostal muscles contract and lift the rib cage up and out
    • Expiration
      • The intercostal muscles relax along with diaphragm
      • The lungs then return to resting size and the air pressure inside the lungs increases to frce air out - passive process
    • The volume of the thoratic cavity decreases
      • Expiration
        • The intercostal muscles relax along with diaphragm
        • The lungs then return to resting size and the air pressure inside the lungs increases to frce air out - passive process
    • Vital Capacity (VC)

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