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. 2019 Jul 12;6:692–702. doi: 10.1016/j.toxrep.2019.06.020

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© 2019 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig. 6 — Photomicrographs of lungs sections for the normal control (A), sub-acute (B–D) and sub-chronic (E–G) stage. (A) Control: shows normal alveolar duct with its walls consisting of adjacent alveoli (blue arrow) separated by interalveolar septa (black arrow). (B) Low dose: has normal histology as compared to the normal control group. (C) Medium dose: mild leukocytosis (blue arrow) with thickened aveoli septa (black arrow). (D) High dose: shows the presence of few inflammatory cells. (E) Low dose: slightly thickened aveoli septa (blue arrow), accompanied by focal inter-aveoli congestion (black arrows) (F) Medium dose: moderately thickened aveoli septa (blue arrow) accompanied by mild inter-aveoli congestion (black arrows) (G) High dose: shows marked leukocytic infiltrate within sections (H&E × 100).