Reproduction Flashcards
What is the embryonic origin of the Gonads?
proliferation of the mesothelium and the condensation of the mesenchyme
What is the embryonic origin of the primordial germ cells?
Endoderm Origin
What induces the development of the Gonads and during what week?
Primordial germ cell migration to the genital ridge. Around week 6
Origin of the primitive sex cords is what?
invagination of epithelium into the mesenchyme
How does the paramesonephric (Mullerian )Duct form?
by the invagination of the coelemic epithelium
The Presence of SRY gene forms what?
gonads to Testes
The absence of SRY gene forms what?
Gonads to ovaries
what does the Primitive sex cord form?
Medullary cord
What 2 things does the medullary cord form?
1) rete Testes
2) seminifurous tubules
Where do spermatogonia originate from?
Primordial germ cells
Where do Leydig cells originate from?
Mesenchyme of the Genital Ridge
Where do Sertoli cells come from?
Mesothelium
What 3 things does the Mesonephric Duct form?
1) Vas defferens
2) Ductus Epidydimis
3) appendix epididymis`
What 2 things form from the EXCRETORY mesonephric duct?
1) paradydimis
2) Ductuli Defferens
Paramesonephric duct forms what two things?
1) prostatic utricle
2) Appendix testis
Where does the seminal colliculus come from?
Primitive urogenital sinus
In females where does the Ovarian Medulla originate from?
The degeneration of the medullary cords
In females during what week do the cortical cords form?
7th week
where do cortical cords form from?
mesothelium
In 4th month cortical cords splits and forms what?
cell clusters called follicles
In females what forms the oogenia
primordial germ cells
If the primordial germ cells dont reach the genital ridge by week __________ gonads will not form
5th week