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Figure 6: Morphological structure of heart tissue in control rats (a) and exposed rats to 70 dB(A) for 5 months (b-d). Control rat showing the normal structure of heart tissue (H and E [a, ×40]). Damaged myocardial cells (Masson's Trichrome) (b, ×40). Necrosis in the myocardium (H and E, [c, ×200]). Necrosis with inflammation (Masson's Trichrome) (d, ×200)

Figure 6: Morphological structure of heart tissue in control rats (a) and exposed rats to 70 dB(A) for 5 months (b-d). Control rat showing the normal structure of heart tissue (H and E [a, ×40]). Damaged myocardial cells (Masson's Trichrome) (b, ×40). Necrosis in the myocardium (H and E, [c, ×200]). Necrosis with inflammation (Masson's Trichrome) (d, ×200)