The effects of Hg2+ on the general morphology of the outer renal cortex. Rats were treated with Hg2+ (0.9% NaCl vehicle control, 0.875 and 3.5 mg/kg, i.p.). 24 h later, the kidneys were removed, and processed for H & E staining. Panels A-C are representative sections from the non-perfused right kidney and panels D-F are representative sections from the perfused left kidney under high-power (HP). (G-I) are representative images of the perfused left kidney under low-power (LP). Panels A, D, G are from vehicle control treated animals, panels B, E, H are from 0.875 mg/kg Hg2+-treated animals and panels C, F, I are from 3.5 mg/kg Hg2+-treated animals. A white arrow in panels H and I represent the boundary between the renal cortex and the outer medulla. The scale bar in the top left image represents 100 μm and the scale bar in the bottom left image represents 500 μm.