Flashcards in development of the genital system Deck (61)
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1
when does the determination of sex occur ?
at fertilizations (determined by male gamete)
2
if the germ cells fail to reach the genital ridges
gonads do not
3
What forms the primitive sex cords ?
coelomic epithelium proliferates and penetrates the mesenchyme to form primitive sex cords
4
3 contributions to the gonads ?
germ cells (endoderm)
coelomic epithelium
mesenchymal cells (Ct)
5
development of the testes is induced by what gene
sry
6
what does the the sry gene encode
Testis dermining factor (TDF)
7
What does TDF cause
sex cords proliferate to form testis
cords grow into a network that will give rise to rete testes
tunica albuginea seperates cords from surface epithlieum
8
seminiferous cords form
seminiferous tubules (sertoli cells and spermatogonia) straight tubules, rete tests and mesenchymal cells
9
what do mesenchymal cells form
leydig cells that produce testerone in week 8
10
which gonad develops first
right
11
descent of the testes is associated with
enlargement of the testes
atrophy of the mesonephric kidney
atrophy of the paramesonephric ducts
enlargement of the processus vaginalis
12
the gubernaculum attached to the uterus becomes what
ovarian ligament and round ligament of uterus
13
canal of nuck
persistent processus vaginalis in female
14
mesonephric duct
duct of the intermediate kidney
15
paramesonephric duct
a longitudinal derivative of epithleium of the urogenital ridge; cranially the duct opens into the coelomic cavity; caudally the two ducts join and fuse together
16
the development of the genital ducts is controlled by
TDF
17
mullerian inhibiting factor
produced by sertoli cells and inhibit development of the mullerian duct
18
testosterone
produced by leydig cells and stimulate continued development of the mullerian duct
19
the mesoneprhic duct gives rise to
epididymis, ductus deferens, ejaculatory duct and seminal vesicle
20
in males the _________ regresses and the ________ perisists
mullerian, mesonephric
21
what are the remnants of mullerian ducts
appendix of testi (paradidymuss) and protatic utricle
22
paramesonephric duct gives rise to what in females
uterine tube, uterus and superior part of vagina
23
remnants of the mesonephric ducts in females
epoophoron+ paraoophoron and the gartner's cyst
24
gartner's syst
scattering of tiny remnants of the mesonephric duct that remain near the vagina
25
the vaginal epithlium arises from
endoderm of the UG sinus,
26
the fibromuscular wall of the vagina arises from
surrounding mesenchyme
27
sinovaginal bulbes fuse to form
vaginal plate (hymen)
28
upper portion of vagina derived from
paramesonephric ducts
29
lower portion of the vagina derived from
urogenital sinus
30
