Stages of the cycle of the seminiferous epithelium in the dog.
In principle, the spermatogenesis of the dog resembles that of other animals. It consists of 6 consecutive, differentiating spermatogonia generations (A1-A4, Im, B). The number of ensuing spermatogenetic cell generations corresponds to that of other mammals. We divided the spermatogenesis of the dog into 10 stages in order to attain a precise systematization. The cell-divisions of the successive spermatogonia occur in stages II, III, V, VI, VII, and VIII. Stages V a and V c are characterized by the meiotic divisions.
D000818:Animals; D004285:Dogs / Q000502:physiology*; D008297:Male; D008540:Meiosis; D008938:Mitosis; D012670:Seminiferous Epithelium / Q000502:physiology* / Q000648:ultrastructure; D013087:Spermatids / Q000502:physiology; D013090:Spermatocytes / Q000502:physiology; D013091:Spermatogenesis; D013093:Spermatogonia / Q000502:physiology; D013737:Testis / Q000502:physiology*