Leydig, Sertoli, and Reinke: three anatomists who were on the ball.
D000715:Anatomy / Q000266:history*; D005858:Germany; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007558:Italy; D007985:Leydig Cells / Q000166:cytology; D008297:Male; D012708:Sertoli Cells / Q000166:cytology; D013737:Testis / Q000166:cytology*