The comparative histomorphometric characteristics of kidney of the untreated control group of young male rats, showed normal histological structures of the renal cortex and medulla (Table 2). Hematoxylin and eosin staining revealed a normal kidney structure with Malpighian bodies consisting of a glomerulus surrounded by Bowman’s capsule. Proximal convoluted tubules with a narrow lumen were lined by pyramidal epithelial cells with acidophilic cytoplasm and basal round vesicular nuclei. Distal convoluted tubules were lined by a relatively larger number of cuboidal epithelial cells with light acidophilic cytoplasm and central round vesicular nuclei (Table 2).