Research Article

The Cortisol Levels, Histology, and Fine Structure of Various Tissues of Fish Gambusia affinis (Baird and Girard, 1853) after Exposure to Lead

Figure 3

Observation of gill structure of Gambusia fish with HE staining. (a) Swelling gill structure of fish exposed to Pb and (b) visible gill structure of control fish without exposure. LS = secondary lemella, LP = primary lamellae, and bar size = 200 µm.
(a)
(b)