Figure 1
Representative light microscopy sections of lung tissues from vehicle- and PM2.5-treated SD rats. Unabsorbed particles in the alveoli are presented in different power images. Red arrow means fine particulate matter deposition; magnification 400×.
Lung histology from control- and PM2.5-exposed SD rats

Representative light microscopy sections of lung tissues from vehicle- and PM2.5-treated SD rats. Unabsorbed particles in the alveoli are presented in different power images. Red arrow means fine particulate matter deposition; magnification 400×.

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