Histopathology images of extracted organs 24 h after HA-NW administration. No significant differences were observed in these organs compared to those from control mice receiving PBS only: (a) mouse liver medulla, (c) mouse lung tissue, (e) mouse kidney medulla, and (g) mouse kidney cortex 24 h after HA-NW injection; (b) mouse liver medulla, (d) mouse lung tissue, (f) mouse kidney medulla, and (h) mouse kidney cortex images from control mouse. Scale bar is 100 μm.