L47: Urogenital Development Flashcards Preview

ANAT FINALS > L47: Urogenital Development > Flashcards

Flashcards in L47: Urogenital Development Deck (58)
Loading flashcards...
1

The Proliferation of the intermediate mesoderm (IM) generates the __________.

Urogenital plate

2

Nephorogenesis involves the successive appearance of 3 kidney primordia. What are they called? (Top to bottom when fetus is facing left)

1. Pronephros
2. Mesonephros
3. Metanephros

3

The ______ derives from the mesonephric duct, while the kidney derives from the caudal end of the nephrogenic cord

Ureter

4

The collecting system of the urinary system (kidney) derives from what?

Uretic bud

5

When the kidney is being developed, what structure is part of the external region?

Ureter

6

When kidney is being developed, what structures are part of the internal region?

Renal pelvis, major calyx, minor calyx, collecting tubes

7

The excretoru system derives from the ________?

Metanephric bastema

8

Changes in the body shape makes the kidney take an ____ position

Abdominal

9

There is disappearance of arteries of kidney during formation except for the __________

Accessory renal artery

10

The cloaca (hindgut region) divides to form the primitive _______, from which the _____ and ___________ derive

Urogenital sinus; bladder & pelvic urethra

11

While the absorption of the mesonephric ducts makes the ureters join the bladder wall, the kidneys äscent" induces the develpment of the ___________

Vesical trigone

12

The genital system derives from the ________ and adjacent ducts

Mesonephros

13

An embryo is bipotent and can develop to male or female. Mesonephros gives rise to 3 things- what are they?

- Mesonephic duct: gives rise to male genital ducts, requires androgens to develop, degenerates in females in response to low androgen levels
- Genital ridge: gives rise to the testes or ovaries (source of androgens and estrogens)
- Paramesonephric (Mullerian) duct: gives rise to female genital ducts, does not require hormones to develop, degenerates in males in response to Mullerian inhibiting substance (MIS)

14

Regardless of the genetic sex, the _____ have an initial indifferent stage

gonads

15

The primordial germ cells (PGCs) are close in proximity/ associated with what two things?

- Proliferating coelomic epithelium
- Primitive sex cords

16

Primordial germ cells give rise to either what or what?

Spermatogonia (male) or Oogonia (female)

17

Priminitive sex cords form what eventually?

Seminiferous cords, which gather together in loops

18

Tunica albuginea formed by thickening of coelmic epithelium that is losing connection with ___________

Seminiferous cords

19

In male embryos the indifferent gonad differentiate into testes under the ____________ gene of the Y chromosome

influence of SRY

20

In the female embryo, the absence of the SRY gene results in dissociation of the primitve sex cords and differentiation of the gonad into _____

ovaries

21

The medullary cords in the female embryo are going to _____

Degenerate and fill with vessels, tissues, etc

22

In ovary, in most mammal (cow, sow), the central location will disappear. In the mare, it will be the opposite the region from the primitive that would disappear will be the __________

Periphery elements

23

Only one region of primitive cord survives- it will get divided and germ cells get enclosed by coelemic cells that give rise to ________

Granulosa cells

24

Primordial follicle derives from the _______

Seminiferous cords

25

In primitive cords, males give rise to ______ cells, females _____ cells

Leydig; theca

26

The _______ derive from the mesonephric tubules, while the epididymis, ductus deferens, ampullas and vesicular glands derive from the ____________.

Efferent ducts; mesonephric duct

27

What is another name for the paramesonephric duct remnant?

Male uterus

28

The uterine tubes, uterus and cranial region of the vagina derive from the ____________ duct, while ___________________ & _____ derive from the urogenital sinus

Paramesonephric duct; caudal region of the vagina and vestibule

29

The dengenerating proxmial mesonephric tubules is called? What about the distal ""?

Epoophorom; paroophorom

30

The ________ derives from mesenchymal cells that proliferate and surround the cloacal membrane

external genitalia