lung function

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  • MECHANICS OF BREATHING
    • INSPIRATION
      • REST
        • DIAPHRAGM CONTRACTS
        • EXTERNAL INTERCOSTALS CONTRACT
        • DIAPHRAGM FLATTENS / PUSHED DOWN
        • RIBS/STERNUM MOVES UP AND OUT
        • THORACIC CAVITY VOLUME INCREASE
        • AIR RUSHES INTO LUNGS
        • LUNG AIR PRESSURE DECREASES BELOW ATMOSPHERIC AIR
      • ACTIVE
        • STERNOCLEIDOMASTOID CONTRACTS
        • SCALENES CONTRACT
        • PECOTRALIS MAJOR CONTRACT
        • DIAPHRAGM FLATTENS WITH MORE FORCE
        • INCREASED LIFTING OF RIBS / STERNUM
        • INCREASED THORACIC CAVITY VOLUME
        • LOWER AIR PRESSURE IN LUNGS
        • MORE ARE RUSHES INTO LUNGS
    • EXPIRATION
      • REST
        • DIAPHRAGM RELAXES
        • EXTERNAL INTERCOSTALS RELAX
        • DIAPHRAGM PUSHED UPWARDS
        • RIBS/STERNUM MOVE IN AND OUT
        • THORACIC CAVITY VOLUME DECREASES
        • LUNG AIR PRESSURE INCREASES ABOVE ATMOSPHERIC AIR
        • AIR RUSHES OUT OF LUNGS
      • ACTIVE
        • INTERNAL INTERCOSTALS CONTRACT
        • RECTUS ABNOMINUS CONTRACT
        • DIAPHRAGM PUSHED UP, HARDER / MORE FORCE
        • GREATER DECREASE TO THORACIC CAVITY VOLUME
        • HIGHER AIR PRESSURE IN LUNGS
        • MORE AIR PUSHED OUT OF THE LUNGS

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