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Imaging 50 nm polystyrene nanoplastics passively labeled with Atto 647N (red) in C. elegans KWN117 adult expressing GFP (green) in the body wall and mCherry (yellow) in the apical intestinal membrane. Confocal overview and high resolution of confocal and STED images of the scanned area indicated by white boxes for parts of the digestive track in the mouth (a–c), pharynx (d–f), and intestine (g–i). Insets in STED images correspond to the areas indicated by white boxes.
