title: Testicular function: a comparative viewpoint.
mesh_terms: D000818:Animals; D001717:Birds / Q000502:physiology; D006801:Humans; D008297:Male; D008322:Mammals / Q000502:physiology; D012104:Reptiles / Q000502:physiology; D012671:Seminiferous Tubules / Q000378:metabolism; D012708:Sertoli Cells / Q000502:physiology / Q000648:ultrastructure; D013091:Spermatogenesis; D013737:Testis / Q000502:physiology*; D013739:Testosterone / Q000096:biosynthesis
chemical_list: D013739:Testosterone