Embryology Genital System Flashcards
Is the gonadal ridge medial or lateral to the nephrogenic (urinary) cord?
medial
During what embryonic weeks is the sexual development of the person “indifferent”?
weeks 1-6
What are the names of the individual male and female genital ducts?
male: mesonephric
female: paramesonephric
During week 5, what thickens to form the gonadal ridge in the embryo?
intermediate mesoderm
mesothelial cells of the gonadal ridge are also known as…
gonadal cord cells
Leydig cells develop from what and produce what?
they develop from mesenchyme of the gonadal ridge and produce testosterone
Sertoli cells develop from what and form what?
they develop from gonadal cord cells and form seminiferous tubules and rete testes
What chemical induces mesonephric ducts to form male genital ducts?
testosterone
What cells produce testosterone in the testes?
leydig cells
Testosterone produced by leydig cells causes mesonephric ducts and mesonephric tubules to “puncture” region of gonadal ridge where testicles are developing to form what three things?
ductus deferens, epididymis, & efferent ductules
Name the three items on the far left of the image
name the following three structures
The caudal ends of the mesonephric ducts develop what two things?
seminal vesicles and ejaculatory ducts
Name the 5 items on the right side of the image
Sertoli cells are responsible for the degeneration of what?
the müllerian duct
The seminal vesicle and the ejaculatory duct form the caudal end of the what?
mesonephric duct
The prostate and bulbourethral (Cowper’s) glands are endodermal outgrowths from the what?
urogenital sinus
During what week do the testes descend?
week 26
What is the name of the ligament that pulls the testis down into the scrotal sac?
gubernaculum
What is a testicular hydrocoele?
development of fluid-filled cysts in the testes/spermatic cord
What is cryptorchidism?
failure of the testes to descend
In females, what are the “caretakers” of PGCs (primordial germ cells)?
follicular cells
_____ surround the primordial germ cells (PGCs) and form ovarian follicles
follicular cells
Does the müllerian duct degrade in the males or the females?
males
A primordial follicle is made up of two things: What and what?
primary oocyte and follicle cell capsule
With females, the lack of SRY leads to the lack of TDF which results in the degeneration of what?
mesonephric duct
What are the two mesonephric duct remnants in the female?
1) epoöphoron
2) paraöphoron
accessory glands of the female genital system
male external genitalia
