reproductive development Flashcards
at what week does the gonads differentiate
7th week
3 sources that gonads are derived from
- mesothelium (posterior wall)
- underlying mesenchyme
- primordial germ cells
appear among the endoderm cells of the yolk sac close to the allntois
primordial germ cells
the __ chromosome codes for the proliferation of the primary sex cords
Y
near the hilus, the cords break up into tiny cell strands, forming the
rete testis
the testis cords are now composed of primitive germ cells and
sertoli cells
what cells produce testosterone
leydig
testis can secrete
testosterone and androstenedione
efferent ductules are derived from _______
mesonephric tubules
rete testis and ductus epididymis are derivatives of
mesonephric ducts
ovaries have what chromosomes
XX
ovaries ____ unlike men
surface epithelium of the female gonad proliferate
at the 7th week, ovaries give ride to the
cortical cords
4th month, cortical cords split into isolated cells clusters that surround
primitive germ cells
germ cells then develop into
oogonia
surrounding epithelial cells develop into
follicular cells
a pair of paramesonephric ducts are found where in a female
nephrogenic cord
female: absence of androgens, ____ cause the paramesonephric ducts to develop into uterine tubes and fuse at midline to form the uterus
estrogens
external male genital development is stimulated by gonadal androgen:
dihydrotestosterone
the genital fold develops into the
urethral plate
the urethral plate elongates and becomes the urethral groove finally becoming the
urethra
without dihydrotestosterone, the genital swellings become the ___ and urethral folds become
labia majora
labia minora
male: derived from urogenital sinus
urinary bladder urethra prostate cowpers gland prostatic utricle
female: derived from urogenital sinus
urinary bladder urethra lower vagina vestibule greater vestibular/urethral glands
male: from mesonephric ducts
efferent ductules duct of epididymis ductus deferens ejact duct seminal vesicles ureter, renal pelvis, calices, collecting tubules appendix of testis
female: from paramesonephric duct
uterine tubes
uterus
upper vagina
formation of hardened tissue in the penis that causes pain (curve)
peyronies disease
carries muscular and fascial layers with it as if forms the inguinal canal
processus vaginalis
fibrous cord that connects the undescended testes to anterior abdominal wall
gubernaculum
testes travel posterior to the ____ and enter ____
processus vaginalis
scrotum
processus vaginalis becomes
tunica vaginalis
gubernaculum becomes
scrotal ligament
derived from tranversalis fascia
internal spermatic fascia
derived from internal oblique aponeurosis. innervated by genital branch of genito femoral
cremasteric muscle
derived from the external oblique aponeurosis
external spermatic fasica
_____ does not contribute to spermatic cord layers
transversus abdominis m
adult remnant of the gubernaculum that connects the ovaries to the uterus
ovarian ligament
adult remnant of the gubernaculum that connects the uterus to the labium majus
round ligament
if there is a incomplete closure of the processus vaginalis, a persistent canal may remain called
canal of NUCK
