The role of the air passages in breathing.. Facilitate the passage of air. Ask and get the debris. Support the lungs and the thoracic wall

Not airways just channels net, but play a role in the processes of inhalation and exhalation, during inhalation manipulate and accommodate to the maximum extent to facilitate passage of air, while the time exhale less in length and diameter due to high pressure inside the rib cage to accelerate the launch air as well as you subtract and get the debris which amounts Natural 150 ml per day and increase in over-chronicler cases. Role of the pleura (Alblora) breathing: working Borktaha wall and visceral support lungs and the wall rib, which allows the lungs lying down maximum, and also allow them to move borne of two of the wall rib cage and therefore the pressure inside the gap between two pleura during exhalation be negative which equals -3 atmospheric pressure and increasingly negative during inhalation, ranging between 6-10,

In the case of forced exhalation up to +4 while forced down during inhalation to _30 atmospheric pressure.
Alveoli role in the mechanism of breathing: alveoli plays an important role, thanks to the rubber walls and muscle fibers interalveolar especially due to the impact of Sir Vaktant (Sur factant) in inflatable and shrinkage of the alveoli.