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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

the indifferent gonad becomes what in females and males

testes in males and ovary in females