Block 4 Embryology Md 1 Genital Part B

Front 1

Fetal testes produces 2 hormones:

Back 1

Testosterone
Antimullerian hormone

Front 2

Testosterone production stimulated by =

Back 2

human chorionic gonadotrophin
(hCG)

Front 3

AMH suppresses development of the =

Back 3

development of the paramesonephric (mullerian) ducts, which form the uterus and uterine tubes.

Front 4

The walls of the seminiferous tubules are composed of two kinds of cell: =

Back 4

Sertoli cells
Spermatogonia,

Sertoli cells derived from =

Spermatogonia, primordial sperm cells derived from the =

Hint 4

surface epithelium of the testis

primordial germ cells.

Front 5

Influence of the sex glands on further sex differentiation

Back 5

.

Front 6

Development of Ovaries
Gonadal development occurs _______ in female embryos

The ovary is not identifiable histologically until about the __week

Back 6

slowly

10th

Front 7

Development of Ovaries
Gonadal cords do not become prominent but they extend into the
________ and form a rudimentary _____ _______ =

Back 7

and form a rudimentary

rete ovarii.

Front 8

Development of Ovaries
primordial germ cells form in the wall of the

Back 8

yolk sac during week __ =

primordial germ cells
later migrate into the developing _____
and differentiate into the _______
_____ ____

Hint 8

4

gonads

definitive germ cells.

Front 9

Development of Ovaries
As the gonadal cords (cortical cords) increase in size, ____ ____ cells are incorporated in them

Back 9

primordial germ

At about __ weeks these cords begin to break up into isolated =

Hint 9

16

cell clusters - primordial follicles

Front 10

Each primordial follicle consists of an

Back 10

oogonium

derived from a =

surrounded by a single layer of flattened follicular cells derived from the =

Hint 10

primordial germ cell

surface epithelium

Front 11

_______ ________ consists of an oogonium, derived from a primordial germ cell, surrounded by a single layer of flattened follicular cells derived from the _____ _______=

Back 11

primordial follicle

surface epithelium

Front 12

Active mitosis of
oogonia occurs during

Back 12

fetal life

producing
thousands of primordial
follicles.

No oogonia form

Hint 12

postnatally

Front 13

Back 13

.

Front 14

Development of Genital Ducts

Back 14

mesonephric

paramesonephric ducts

Hint 14

(wolffian - medial)

mullerian - lateral

Front 15

►Genital ducts in the sixth week in the male (A) and female (B). The mesonephric and paramesonephric ducts are present in both.

Back 15

pic +

Hint 15

Transverse section through the testis in the eighth week

Front 16

Fig: Influence of the sex glands on further sex differentiation

Back 16

.

Front 17

Derivatives of mesonephric duct in males
3ct

Back 17

Epididymis
Ductus deferens
Ejaculatory duct

In female fetuses the mesonephric ducts almost completely disappears.

Hint 17

Front 18

The paramesonephric ducts develop lateral to the =

Back 18

gonads
mesonephric ducts

Front 19

The paramesonephric ducts
They develop from the =

Back 19

mesothelium

Front 20

The paramesonephric ducts plays an essential role in the development of the
=

Back 20

female reproductive system.

Front 21

The paramesonephric ducts pass, parallel to the =

Back 21

mesonephric ducts

until they reach the future =

Hint 21

pelvic region of the embryo

Front 22

The paramesonephric ducts pass, parallel to the mesonephric ducts, until they reach the future pelvic region of the embryo

Here they cross ventral to the mesonephric ducts, approach each other in the median plane, and fuse to form a Y-shaped =

Back 22

uterovaginal primordium.

Front 23

This tubular structure projects into the dorsal wall of the urogenital sinus and produces an elevation - the sinus =

Back 23

(paramesonehric) tubercle.

Hint 23

Front 24

Note the paramesonephric duct -- produces

Back 24

uterine canal.

Front 25

Note the paramesonephric duct -- produces =

Back 25

uterine canal.

Front 26

The fetal testes produce masculinizing hormones

Back 26

(testosterone)

a mullerian inhibiting substance (MIS)

Front 27

Sertoli cells secrete =

Back 27

MIS

Front 28

Interstitial cells secrete

Back 28

Testosterone

Front 29

A lateral outgrowth from the caudal end of each mesonephric duct gives rise to the =

Back 29

seminal gland (seminal vesicle)

Front 30

what glands produces a secretion that nourishes the sperms =

Back 30

seminal gland (seminal vesicle)

Front 31

Prostate is derived from = ____ ____
arise from the prostatic part of the urethra.

Back 31

endodermal outgrowths

Front 32

Prostate is derived from endodermal outgrowths arise from the =

Back 32

prostatic part of the urethra.