Figure 3

Distribution of 3.5 mm sized airways over airwaygenerations. The distribution of 3.5 mm internal lumensized airways over the 2^nd till 7^th airwaygenerations in the apical upper lobe bronchus (B1) and over the6^th till 12^th generation in the lower lobebronchus (B10) in the right lung, for subjects with and withoutairway obstruction, for subjects with and without Chronic MucusHypersecretion (CMH) and for current and former smokers. The numberof cases (e.g. no CMH and CMH) in each group was limited but thedistribution was similar.