Heath Ledger's Parents: Daughter Matilda is 'Very Much Like Her Dad'. Actor Heath Ledgerâs daughter Matilda, 7, looks an awful lot like her daddy, and his parents agree the two are âvery muchâ alike. In recognition of the fifth anniversary of Heathâs death on Jan. 22, Kim and Sally Ledger sat down with Australiaâs New Idea magazine to talk about their son.
The primitive stem cell of spermatogenesis found on the periphery of each seminiferous tubule is called spermatogonia. Spermatogonia is an undifferentiated male germ cell.
Inside each testis is a network of fine-diameter tubes called seminiferous tubules. Sertoli cells form the walls of a seminiferous tubule. Sertoli cells nourish, support, and protect developing germ cells, which undergo cell division by meiosis to form spermatozoa (immature sperm).