1.1 development of the reproductive system - descent of the gonads Flashcards
where do testis arise?
in upper lumbar regions
what is testis tethered to and by what in males?
tethered to labioscrotal folds by gubernaculum
what is labioscrotal folds?
future scrotum
what happens as the body grows?
the relative positions of the testis becomes more caudal
what envaginates into the scrotum as it develops?
musculo-fascial layer + peritoneal membrane
what does the musculo-fascial layer + peritoneal membrane form?
processus vaginalis
what happens between 25-28 weeks of gestation to the testis?
it migrates over the pubic bone, behind the processus vaginalis
when do the testis reach the scrotum?
by 34-40 weeks
surrounded by processus vaginalis
what happens above the testis?
the fascia and peritoneum become closely apposed (together)
what forms the spermatic cord?
fascial layers
obliterated stem of processus vaginalis
vas deferens
testicular vessels & nerves
where is the spermatic cord?
within the inguinal canal in males
what is the vestigial remnant of the gubernaculum in males?
scrotal ligament
where do the ovaries shift to from the posterior abdominal wall? (retroperitoneal)
less dramatic caudal shift
what attaches the ovary to labioscrotal folds?
gubernaculum
what does the gubernaculum become in females?
ovarian ligament and round ligament of uterus
