Simplify the following text for a Grade 12 native English-speaking person.
Original: Sertoli cells are called so because of their eponym Enrico Sertoli , an Italian physiologist who discovered them while studying medicine in the University of Pavia , Italy .
Simplified: Sertoli cells get their name from Enrico Sertoli , an Italian physiologist . He discovered them while studying medicine in the University of Pavia , Italy .