part of part of develops from develops from embryo epithelial cord embryonic tissue gonadal ridge sex cord Wikipedia:Sex_cords NCIT:C34183 primitive sex cord Cordlike masses of epithelial tissue that invaginate from germinal epithelium of the gonad and give rise to seminiferous tubules and rete testes in the male, and primary ovarian follicles and rete ovarii in the female. UMLS:C1512242 gonadal cord UBERON:0005295 RETIRED_EHDAA2:0001523 genital cord gonad cord SCTID:343823004 meso-epithelium