Figure 9

Mean linear intercepts and lung internal surface areas ofDBA/2mice at various time-points during chronic cigarette smoke exposure. Mean linear intercept (LM) (A) and internal surface area /ISA) (B) of the lungs of DBA/2 mice at various time-intervals during chronic exposure to cigarette smoke. Data from 8 animals for each time point are given as mean ± SD. * p < 0.05 versus air-exposed controls.