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Histopathology confirmed the biodistribution of PS micro- and nanoplastics in the organs. Representative merged fluorescence images showed the biodistribution of PS50, PS500, PS5000 and their mixtures in A) brain, B) heart, C) liver, D) kidney and E) epididymis after 24 h exposure (n = 5 per group). The font color represented the fluorescent color of the particle. The nucleus was stained with DAPI in blue
