Block 4 Embryology Md 1 Genital Part C

Front 1

Development of female genital ducts and glands

Mesonephric ducts regress because of absence of

Back 1

testosterone

Front 2

Paramesonephric duct develops because of absence of =

Back 2

MIS

Front 3

Derivatives of paramesonephric duct

Back 3

-Broad ligament of uterus

-uterine tubes

-Uterus from
and
-vagina from =

Hint 3

uterovaginal primordium

Front 4

Note the paramesonephric duct -- produces =

Back 4

uterine canal.

Front 5

By week 12, female and male characteristics can be recognized. By week __ phenotypic sexual differentiation is complete.

Back 5

20

Front 6

By week 12, female and male characteristics can be recognized. By week 20,

Back 6

phenotypic sexual differentiation is complete.

Front 7

Early in the 4th week, proliferating mesenchyme produces a

Back 7

genital tubercle

in both sexes at the cranial end of the

Hint 7

cloacal membrane.

Front 8

Labioscrotal swellings and urogenital folds soon develop on each side of the =

Back 8

cloacal membrane

Front 9

_______ _________ & ________ _________
soon develop on each side of the cloacal membrane

Back 9

Labioscrotal swellings
and
urogenital folds

The genital tubercle soon elongates to form a

Hint 9

primordial phallus.

Front 10

Labioscrotal swellings and urogenital folds soon develop on each side of the cloacal membrane

The genital tubercle soon elongates to form a

Back 10

primordial phallus.

Front 11

►proliferating mesenchyme produces a genital tubercle in both sexes at the =

Back 11

cranial end of the cloacal membrane

Front 12

Masculinization of the indifferent external genitalia is induced by

Back 12

testosterone

produced by the =

Hint 12

interstitial cells of the fetal testes.

Front 13

Masculinization of the indifferent external genitalia is induced by testosterone produced by the

Back 13

interstitial cells of the fetal testes.

Front 14

As the phallus enlarges and elongates to become the penis, the urogenital folds form the lateral walls of the =

Back 14

urethral groove

on the ventral surface of the penis.

Front 15

As the phallus enlarges and elongates to become the penis, the urogenital folds form the lateral walls of the urethral groove on the ______ _________ of the penis.

Back 15

ventral surface

Front 16

The urogenital folds fuse with each other along the ventral surface of the penis to form the =

Back 16

spongy urethra.

Front 17

______ ______ fuse with each other along the ventral surface of the penis to form the spongy urethra.

Back 17

urogenital folds

Front 18

The urogenital folds fuse with each other along the ____ _____ of the penis to form the spongy urethra.

Back 18

ventral surface

Front 19

The surface ectoderm fuses in the median plane of the penis, forming the

Back 19

penile raphe

Front 20

During the twelfth week a circular ingrowth of $ ______ occurs at the periphery of the glans penis

Back 20

ectoderm

When this ingrowth breaks down, it forms the =

Hint 20

prepuce (foreskin)

Front 21

Back 21

.

Front 22

The labioscrotal swellings grow
toward each other and fuse to form the =

Back 22

scrotum

The line of fusion of these folds is clearly visible as the =

Hint 22

scrotal raphe.

Front 23

The____ ____ grow toward each other and fuse to form the scrotum

The line of fusion of these folds is clearly visible as the scrotal raphe.

Back 23

labioscrotal swellings

Front 24

Development of Female External Genitalia

Growth of the primordial phallus gradually ceases and it becomes the

Back 24

clitoris

Front 25

The unfused parts of the urogenital folds form =

Back 25

labia minora.

Front 26

Most parts of the labioscrotal folds remain unfused and form two large folds of skin, the =

Back 26

labia majora

which are homologous to the

Hint 26

scrotum

Front 27

Back 27

.