T3 Reproductive System Flashcards
What gene cause the development of sertoli cells?
SRY
Sertoli cell secrete what to generate “maleness.”
Mullerian inhibiting factor
What is the effect of mullerian inhibiting factor?
it causes the regression of the mullerian ducts.
What is produced by the interstitial cells of the rete cords that causes the retention of the mesonephric ducts?
testosterone
What structures are present in a female?
mullerian ducts remain and the mesonephric ducts will eventually regress
What germ layer is the origin for the entire reproductive system?
mesodermal
Within the indifferent gonad, there is an outer cortex and an inner medulla. within the medulla, what the the structure that has the potential to give rise to the seminiferous tubules, which contain sertoli cells and interstitial cells in the event of a genetic male?
sex cords
What structure in the genetic male anatomoses with the sex cords?
rete cords.
In the genetic female, the medulla regresses and the cortex forms what structure?
ovary
What is the connective tissue layer that separates the cortex and the medulla?
tunica albuginea
the medulla of indifferent gonad will form what in the male?
testis
The sex cords form seminiferous tubules with sertoli cell and interstitial cells. these cords are solid until when??
Puberty, when spermatogenesis begins
What forms the efferent ductules in the male?
mesonephric tubules in the vicinity of the gonads
What three things does each mesonephric duct form?
epididymus, seminal vesicle, and vas deferents
What forms the ovary in the female?
the cortex of the indifferent gonad
What structures degenerate in the female?
rete cords, sex cords, mesonephric tubules and mesonephric ducts.
What do the mullerian ducts give rise to?
oviducts, uterus, and a portion of the vagina
What is the name for a single uterus formed by the fusion of a uterus with two prominent expansions?
simplex uterus
The proximal ends of the mullerian ducts expand to become what structure?
the ostia of the oviducts
Where are eggs released from? Where do they enter? What is their path?
Graafian follicles; enter the ostia; journey down to the uterus
In female, the ovaries retain their position in the abdomen. In males, this does not occur, why?
abdominal temperatures are too high and interfere with sperm formation.
What structures does the genital tubercle give rise to?
male: glans of penis
female: clitoris
What structures does the genital folds give rise to?
male: shaft of penis
female: labia minora
What structures does the genital swellings give rise to?
male: scrotum
female: labia majora
While the gonad is developing into testis or ovary, the primordial germ cells that appeared very early in development will migrate where?
to the developing gonad
What occurs if the primordial germ cells fail to reach the gonads?
the organism will develop normally anatomically, but will be sterile because of the absence of germ cells in its gonads
