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(a) (10×) and (b) (40×) unexposed group with good morphology and organization of tubules testis; (c) (10×) and (d) (40×) group exposed to 4mg/L TiO2-NPs with disorganization of tubules testis. Green arrows indicate the intact and well organization of tubules testis, while the red arrows indicate their disordered organization. Scale bar 260 µm.
