Development of Urogenital system Flashcards Preview

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Flashcards in Development of Urogenital system Deck (60):
1

urogenital system develops from

intermediate mesoderm

2

hindgut is from

endoderm and splanchnic mesoderm

3

external genitalia is from

ectoderm

4

source of germ cells

migratory cells from the yolk sac

5

what forms gonads

genital ridge

6

what forms primitive kidneys and ducts of reproductive tract

mesonephric ridge- caudal part, cranial part regresses

7

parts of the mesonephric ridge

pronephros
mesonephros
metanephros

8

pronephros

disappears

9

mesonephros

tubules and ducts for make reproductive tract

10

metanephros

primative kidney

11

uteric bud

forms collecting ducts
comes from outgrowth of mesonephric bud

12

metanephric blastema

formed from metanephros, makes nephrons

13

trigone formation

mesonephric duct joins the urogenital sinus and is absorbed, bringing the uteri bud in contact with the urogenital sinus

14

mesonephric duct forms

forms ductus deferens

15

uteric bud forms

forms ureter and collecting ducts

16

urogenital sinus forms

bladder

17

ductus deferens path

looped over the ureter as testis descends

18

renal agenesis

failure of kidney to develop which results in no amniotic fluid--> tight space--> deformed fetus

19

polycystic kidney

urine formation without proper drainage resulting in cyst formation

20

pelvic kidney

kidney doesn't descend

21

horseshoe kidneys

kidneys fuse at midline and begin to ascend but they get stuck under the IMA

22

bifid ureter

2 ureters exit kidney but merge before entering the bladder

23

ectopic ureter

2 ureters enter the bladder
governed by Weigert-Meyer rule

24

weiger-Meyer rule

lower pole kidney gets to bladder first and is normal
upper pole kidney gets to bladder second and doesn't ascend, it descends into the neck of the bladder, vagina, or rectum

25

hydronephrosis

high pressure

26

testis determining factor

on sex determining region on Y chromosome
induces sertoli cell differentiation and production of anti-mullarian hormone

27

anti-mullarian hormone

paramesonephric ducts regress
leydig cells differentiate and produce testosterone

28

testosterone role

induces mesonephric duct differentiation and testis formation

29

how is paramesonephric duct formed

involution of mesonephric ridge

30

migratory path of germ cells

yolk sac
allantois
across gut wall
dorsal mesentary
retroperitoneal space
primative gonand of genital ridge

31

formation of primative sex cords

germ cells stimulate coelomic epithelium to proliferate and invade storm
cortex and medulla form

32

fate of male medulla of primitive sex cord

seminiferous tubules and straight ducts and rate testis

33

fate of male cortex of primitive sex cord

regresses, forms tunica albuginea

34

fate of female cortex of primitive sex cord

becomes follicles

35

fate of female medulla of primitive sex cord

regresses

36

uterus formation

paramesonephric ducts fuse at midline

37

vagina formation

upper 1/3- paramesonephric ducts
lower 2/3- urogenital sinus

38

remnants of the mesonephric duct in females

epoophoron and paraoophoron in mesovarium
gartner's cyst near vagina

39

uterus didelphys with double vagina

2 vagina, 2 uterus

40

uterus arcuates

thick uterine fundus

41

uterus bicornis

2 uterus, 1 vagina

42

uterus bicornis with rudimentary horn

2 uterus but one of the is not attached

43

atresia of cervix

closed cervix

44

atresia of vagina

closed vagina

45

parts of hindgut

endoderm and splanchnic mesoderm

46

allantois becomes the

median umbilical ligament

47

parts of the cloaca

urogenital sinus
anorectal canal

48

urogenital sinus becomes

bladder, urethra, external genitalia

49

anorectal canal becomes

anal canal, rectum, hindgut

50

significance of cloacal membrane

transition between endoderm and ectoderm

51

persistant anal membrane

no anal openin

52

rectoperineal fistula

anal opening is in the wrong place, in the perineal area

53

rectovaginal fistula

anal opening into vagina

54

urorectal fistula

anal opening into urethra

55

parts of urogenital sinus and what they become

bladder- bladder
pelvic- membranous urethra
definitive UG sinus- vestibule of vagina or spongy urethra

56

genital tubercle becomes the

clitoris/penis

57

urethral folds become the

labia minora/spongy urethra

58

labia minora lining

vestibule- endoderm
ectoderm- surface

59

genital swellings become the

labia majora/scrotum

60

hypospaides

incomplete fusion of urethral folds