Fig. 2.
The relative change in airway radius of all airways for the symmetric and 100% asymmetric tree throughout the simulation at a relative smooth muscle activation level (Tr) = 0.9. The initial bifurcation in the behavior of airway radii may occur for both trees approximately after the same number of breaths, but the symmetric tree shows a greater number of bifurcation points over a greater number of breaths before equilibrium is reached. Histograms of the corresponding radii at the final breath are shown on right.