Respiratory part 2

  1. Pulmonary ventilation (breathing)
    Breathing process of air moving into and out of the lungs so that the gases in the air sacs (aveoli) of the lungs are continuosly refreshed.
  2. External respiration
    Gas exhchange that occurss between the blood and alveoli ( oxygen loading and co2 unloading)
  3. Respiratory gas transport
    O2 and CO2 are transported to and from the lungs and tissue via the bloodstream
  4. Internal respiration
    Gas exchange occurs between the blood and the body's tissues in the systemic capillaries.
  5. Volume and pressure 

    • >During the process of taking air into the lungs (inspiration) the diaphram & intercostal muscles contract, causing the thoracic cavity to increase in size. 
    • >Volume increases to accomodate the air entering the lungs.
    • >As air move into the lungs the pressure decreases.
  6. Volume and pressure

    • >During breathing out process ( expiration) the diaphragm & intercostal muscles relax, the lungs recoil, and intrapulmonary volume decreases. 
    • > gases inside the lung are forced together causing pressure to increases as it forces the gases out.
    • >pressure become equal as we breath out.
  7. Asthma
    • >person have narrow passageways
    • >expiration becomes an active process.
    • >person uses intercostal and abdominal muscles to force air out of the lungs.
  8. Respiration rate
    • >dependent upon the persons size, gender,age, physical capabilities.
    • > rate increased in an unwell person
    • >have difficulty breathing out
    • >use their abdominal muscles and diaphragm to aid in forcing air out of lungs.
  9. Eupnea
    Normal quite breathing
  10. Respiration Volume

    Tidal Volume (TV)
    Normal respiration (12 breaths/min: approx 500ml)
  11. Dead space volume (DSV)
    30% of air remaining in the conducting zone 
  12. Expiratory reserve volume (ERV) 
    The amount of air that is forced out of the ungs after tidal volume, amounting to as much as 1200ml
  13. Inspiratory reserve volume (IRV)
     Exceeding the normal breathing (TV) involving 2100-3200ml
  14. Residual volume (RV)
    The amount of air not able to be expelled from lung- this may be 1200ml
  15. Vital capacity (VC)
    • Total of amount of air exchange in the lung.
    • Total of tv, irv,and erv
Card Set
Respiratory part 2