Bone marrow-derived dendritic cell (BMDC) morphology by scanning electron microscopy (SEM). (A) SEM image (500× magnification) of immature dendritic cells (DCs) formed by monocytes after 6 days of induction; (B) SEM image (500× magnification) of mature DCs formed by monocytes after 8 days of induction; (C) SEM image (4K× magnification) of immature DCs formed by monocytes after 6 days of induction; (D) SEM image (4K× magnification) of mature DCs formed by monocytes after 8 days of induction.