Figure 2. Effects of Cd on the testis of Sinopotamon henanense by Light microscope (400×).

(A) Control group, the testis of control crabs showed normal structure, (B) Treated with 14.50 mg·L⁻¹ Cd group, vacuolar degeneration appeared in the spermatogenic epithelium (white arrow), (C) Treated with 29.00 mg·L⁻¹ Cd group, the number of sperms in the lumina of the seminiferous tubules was decreased (white arrow), (D) Treated with 116.00 mg·L⁻¹ Cd group, the germinal layer in the seminiferous tubules exhibited extensive necrosis (black arrow) as well as edema in the interstitial space (white arrow).