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Figure 8: Morphological evaluation of thyroid gland in rats exposed to noise. (a) (×40): Control group showed normal thyroid with colloids of different size (c: Colloid). (b) (×40): Animal exposed to 70 dB(A) showed damage cells of thyroid gland with inflammatory reaction. (c and d) (×100): Animals exposed to 85 dB(A). Thyroid gland is completely disorganized when the colloids are filled with inflammatory cells (c) and pathological effect demonstrated in (d), few intact colloids and the other replaced by connective tissue

Figure 8: Morphological evaluation of thyroid gland in rats exposed to noise. (a) (×40): Control group showed normal thyroid with colloids of different size (c: Colloid). (b) (×40): Animal exposed to 70 dB(A) showed damage cells of thyroid gland with inflammatory reaction. (c and d) (×100): Animals exposed to 85 dB(A). Thyroid gland is completely disorganized when the colloids are filled with inflammatory cells (c) and pathological effect demonstrated in (d), few intact colloids and the other replaced by connective tissue