title: Histochemical and biochemical investigation on the annual cycle of testis, epididymis, and plasma testosterone of the tortoise, Testudo hermanni hermanni Gmelin.
mesh_terms: D015096:3-Hydroxysteroid Dehydrogenases / Q000378:metabolism; D000818:Animals; D004822:Epididymis / Q000201:enzymology / Q000502:physiology*; D006651:Histocytochemistry; D008297:Male; D009929:Organ Size; D010507:Periodicity; D012621:Seasons; D013091:Spermatogenesis; D013737:Testis / Q000201:enzymology / Q000502:physiology*; D013739:Testosterone / Q000097:blood*; D014426:Turtles / Q000502:physiology*
chemical_list: D013739:Testosterone; D015096:3-Hydroxysteroid Dehydrogenases