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Electron micrographs of testis tissues from control and PNP-treated rats. Tissues from the control rats appeared normal (A), but the PNP-treated rats showed salient histopathological features, including vacuoles between Sertoli cells (B) and spermatogonia (C), pyknosis (D) and apoptotic bodies (E) in germ cells. Moreover, mitochondrial sheath deletion of microscler spermatids (F) and lipid droplet deposition in spermatocytes (G) were also detected in the PNP-treated group.
