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Micrographs of peritoneal macrophages after microspheres phagocytosis. Transmission electron microscopy of peritoneal macrophages incubated with microspheres for 3 days (A), 5 days (B), 8 days (C), 10 days (D) and 15 days (E). Microspheres persisted inside the cells and remained in vesicles during all the time points analyzed. (F): Peritoneal macrophages without exposure to microspheres.
