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Sexual Differentiation - Anatomy & Physiology (view source)
Revision as of 10:02, 3 July 2008
, 10:02, 3 July 2008→Internal Genetalia
* Sex cord cells proliferate to form the testes cord. During this period '''SRY''' is expressed for the first time within '''Sertoli cells''' (SRY is NOT expressed in primordial germ cells).
* Sex cord cells proliferate to form the testes cord. During this period '''SRY''' is expressed for the first time within '''Sertoli cells''' (SRY is NOT expressed in primordial germ cells).
* Sex cords with a basement membrane become '''Semniferous Cords''' which give rise to '''Semniferous Tubules'''.
* Sex cords with a basement membrane become '''Semniferous Cords''' which give rise to '''Semniferous Tubules'''.
* Within the semniferous cords are two cell populations:
* '''Within the semniferous cords''' are two cell populations:
** '''Primordial germ cells''' - Prospermatogonia which give rise to '''Spermatozoa'''
** '''Primordial germ cells''' - Prospermatogonia which give rise to '''Spermatozoa'''
** '''Mesodermal cord cells''' which give rise to '''Sertoli cells'''
** '''Mesodermal cord cells''' which give rise to '''Sertoli cells'''
* '''Between cords''', the loose mesenchyme undergoes '''vascularisation''' and develops as '''stromal tissue'''.
* Within the stromal tissue, cells condense into clusters to form specialized endocrine units - the interstitial '''Leydig Cells'''
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