(a)
(b)
Figure 5: H&E stained sections of lungs at 20x magnification. (a) Lung sections of control rats showing normal histology. Note the presence of the alveoli with its surrounding interalveolar septa , bronchus , and pulmonary vessels with normal blood flow . (b) Lung sections of treated animal (2000 mg/kg) showing normal structure of the bronchi and alveoli.