Figure 5: Morphological structure of heart tissue in control rats (a) and exposed rats to 70 dB(A) for 3 months (b-d). Control rat showing the normal structure of heart tissue (Masson's Trichrome) (a, ×40). Dilated veins and artery deposits in the myocardium (H and E, [b, ×40]). veins without endothelium (H and E, [c, ×100]). Dilated veins with inflammatory reaction in the endocardium.(Masson's Trichrome) (d, ×100). ic: Inflammatory cells; dv: Dilated veins; ad: Artery with deposit. The black arrows indicate the absence of endothelium and arrangement of myocardial cells directly to red blood cells
![Figure 5: Morphological structure of heart tissue in control rats (a) and exposed rats to 70 dB(A) for 3 months (b-d). Control rat showing the normal structure of heart tissue (Masson's Trichrome) (a, ×40). Dilated veins and artery deposits in the myocardium (H and E, [b, ×40]). veins without endothelium (H and E, [c, ×100]). Dilated veins with inflammatory reaction in the endocardium.(Masson's Trichrome) (d, ×100). ic: Inflammatory cells; dv: Dilated veins; ad: Artery with deposit. The black arrows indicate the absence of endothelium and arrangement of myocardial cells directly to red blood cells](articles/2014/16/73/images/NoiseHealth_2014_16_73_416_144424_f5.jpg)