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Anatomy > Gonadal Development > Flashcards

Gonadal Development Flashcards

1
Q

The embryo goes through 3 attempts to form excretory ducts. What are they?

A

Pronephros, mesonephros, and metanephros

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2
Q

Is pronephros the first attempt the embryo makes? How long is its lifespan?

A

Yes! Short-lived & contributes pronephric duct

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3
Q

Is mesonephros the second attempt of the embryo to make an excretory duct? & what’s its lifespan

A

Yes! Its lifespan is substantial & it adopts the paranephic ducts. Becomes mesonephric duct

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4
Q

What is the metanephros

A

Adult kidney

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5
Q

SAME FOR MALES & FEMALES: Where do primordial germ cells populate during early embryonic development?

A

Yolk sac to protect them from differentiation processes. They eventually migrate back into embryo through parts of GIT

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6
Q

Where do primordial follicles migrate to?

A

From yolk sac to genital ridge which is adjacent to mesonephric kidney

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7
Q

Where is the genital ridge located relative to mesonephros?

A

Medial

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8
Q

MALES: at the genital ridge, coelomic epithelium develops into cell cords which penetrates

A

Genital ridge & take primordial germ cells with them

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9
Q

MALES: cell cords form

A

Tubules - this means inside of cell cords are invested with primordial germ cells

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10
Q

MALES: Primordial germ cells start to develop

A

Sertoli cells & germinal epithelium

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11
Q

In males, the seminal epithelium thickens and forms CT known as

A

Tunica albuginea

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12
Q

MALES: does the paranephric duct deteriorate>

A

Yes

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13
Q

MALES: do cell cords attach to the rete testis?

A

Yes

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14
Q

MALES: What happens when the mesonephros starts to deteriorate?

A

Tubules also begin to deteriorate except about 12. These provide connectivity from mesonephric duct to rete testis

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15
Q

MALES: The tubules change shape so that

A

Their origin and termination are located at the rete testis

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16
Q

MALES: Rete testis forms communication with

A

mesonephric tubules

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17
Q

MALES: is there a thick tunica albuginea

A

Yes

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18
Q

MALES: tubules mature into

A

Efferent ductules which connect to duct of epididymus

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19
Q

FEMALES: cell cords start to fragment and end up as

A

Clusters of cells in mesenchyme of genital ridge

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20
Q

FEMALES: primordial cells keep dividing by

A

Mitosis

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21
Q

FEMALES: Clusters of cells break down so that each cell is

A

A germ cell Invested with single layer of coelomic epithelium cells to eventually form granulosa cells

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22
Q

FEMALES; is there a thick tunica albuginea?

A

No

23
Q

FEMALES: does mesonephric duct deteriorate/

A

Yes

24
Q

FEMALES: does a rete ovarii develop?

A

Yes

25
Q

FEMALES: does the rete ovarii communicate with mesonephric tubules?

A

No

26
Q

FEMALES: do mesonephric tubules degenerate?

A

Yes but paramesonephric duct stays & is developed

27
Q

FEMALES: the mesenchyme starts to organize around primordial follicles and contributes which cell type?

A

What becomes thecal cells

28
Q

FEMALE:Germ cells live in which part of the gonad

A

Cortex

29
Q

FEMALE: what part of the gonad contains the rete ovarii & is there outside communication?

A

Medulla & no

30
Q

FEMALES: the mesovarium brings ________ to the gonad

A

Blood supply - exception to NO outside communication with rete ovarii as communicates through lymph

31
Q

Things in gonadal development that are same in female & male

A

-presence of coelomic epithelium
- cell cords invade into mesenchyme
- presence of mesonephric & paramesonephric ducts

32
Q

MALE: suspensory ligament of gonad comes off the

A

Cranial pole of gonad

33
Q

MALE:The gubernaculum comes off

A

The caudal pole of the gonad

34
Q

MALE: The gubernaculum runs from the __________ to the _________

A

Caudal pole of gonad through the inguinal ring

35
Q

MALE: Gubernaculum function

A

Guides descent of testi into scrotum

36
Q

FEMALE: Gubernaculum function

A

Kinda nothing as it does NOT provide function of guiding ovary into scrotum however, it is present

37
Q

FEMALE: which species are gonads most caudal?

A

Ruminants <3

38
Q

FEMALE: where is the proper ligament of artery located?

A

Gubernaculum to where uterus crosses

39
Q

FEMALES: what is the round ligament of uterus & where does it go?

A

Remnant of gubernaculum running from uterus toward inguinal ring

40
Q

FEMALE: in some cases, the round ligament of uterus goes through the

A

Inguinal ring. If it does, called the vaginal process

41
Q

Females: can the female dog get inguinal hernias

A

Yes bc inguinal ring remains open

42
Q

What is the shelf of tissue

A

Area that divides urogential tract + GIT

43
Q

What do cloacal folds become

A

Urogenital opening after shelf of tissue divides the urogenital + GIT opening

44
Q

Do males & females have cloacal folds

A

Yes at beginning

45
Q

Do males and females have genital tubercles?

A

Yes

46
Q

Do males & females have lateral swelling

A

Yes - where gubernaculum attaches

47
Q

In males, lateral swellings become

A

Scrotum as it receives testicles

48
Q

In females, lateral swellings become

A

Nothing they regress

49
Q

In males or females is there a larger perineum development

A

Females

50
Q

In males, genital folds fuse to form

A

Penile urethra & body of penis

51
Q

In females, urogenital folds become

A

Labia of vulva

52
Q

In females, the genital tubercle becomes

A

The clit (found it)

53
Q

In males, the genital tubercle becomes the

A

Glans of penis

Anatomy (41 decks)

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