Fig. 2. Histology of adrenal gland in stressed and control rats, stained with AZAN trichome. (A) ZF in rats exposed to heat stress, showing dark and light regions. Scale bar, 100 µm. (B) Light part of ZF in heat stressed rats, showing cells filled with lipid droplets. Scale bar, 20 µm. (C) ZR cells containing increased numbers of condensed nuclei in heat stressed rats. Interstitial fibrosis is present. Scale bar, 20 µm. (D) Adrenal gland of control rats. Scale bar, 100 µm. (E) ZF cells of control rats; a moderate number of lipid droplets was present in the cells. Scale bar, 20 µm.