0.03, 0.21, 0.89, 0.75, and 0.75, respectively. On the other hand, with the combined dose of mercury and lead categorized as high and selenium dose categorized as low, the concentration of mercury and lead in these tissues were modulated by factors of 1.51, 0.68, 1.28, 1.45, and 1.45, respectively, while that of selenium were modified by factors of 0. 05, 0.30, 0.45, 0.60, and 0.60, respectively 0.82, 2.89, 0.96, 0.64, and 0.64, respectively.