Fig. 1.

Representative photomicrographs of epididymal spermatozoa from male rats orally administered titanium dioxide nanoparticles and/or cadmium including abnormalities in sperm tail (Green arrow) and in sperm head (Pink arrow). (A) Normal sperm, (B), (C) Bent tail, (D) Looped tail, (E) Fused heads, (F) Bent head, (G) Curved tail, (H) Detached tail, (I) Curled tail, (J) Headless tail, (K) Coiled tail, (L) Bent tail with the protoplasmic droplet. (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)