Figure 5.

Photographs of rat thyroid tissue with HSP-90 inmunohistochemistry show how peripheral follicles increased in size after acute exposure. Photos a and b: animals euthanized 90 min after exposure to 0 W (control) and 3 W, respectively (group A); c and d: animals euthanized 24 h after exposure to 0 W (control) and 12 W, respectively (group B). Asterisk * indicates peripheral follicle diameter (PFD), single arrows indicate capsular membrane (CM), double white arrows indicate peripheral septa thickness (PST); magnification 40×, calibration bar = 50 µm. (A color version of this figure is available in the online journal.)