The testis cord is the earliest morphological sign of testis differentiation, and is discernible at approximately 36 hours following SRY expression, between E12.0-12.5. The testis cord comprises aggregates of germ cells surrounded by a layer of Sertoli cells, which are, in turn, encased by peritubular myoid cells. Eventually, the testis cord matures into the seminiferous tubules of the adult testis.
The basement membrane formed by and between Sertoli and peritubular myoid cells is an important component of the sex cords.
Multiple AncestorsSingle AncestorNo DescendantsDevelops fromPart of Parent