Fig. 3

Lung histology and morphometric analysis. Normoxic and hyperoxic study groups are illustrated with white and grey box plots, respectively. a, b Representative microscopic photographs of lung sections in normoxia (a) and hyperoxia (b). Magnification ×10. c–e Alveolar count, mean linear intercept, and ratio of α-SMA-positive lung tissue area/total parenchymal tissue area in normoxia (n = 8) and hyperoxia (n = 8). Data are expressed as vertical box plots with median, 10th, 25th, 75th, and 90th percentiles. Asterisk displays a significant change between study groups, p < 0.05