(final) Lecture 15 (6/1/16) PT. 1 Flashcards
How do gonads develop?
in a retroperitoneal position (to dorsal body wall)
What germ layer are gonads derived from?
intermediate mesoderm
The testis take over the mesonephric duct for itself and it ends up becoming what?
spermatic duct (ductus deferens or vas deferens)
Male testes descend from their initially retroperitoneal position, through the body wall, into a pouch protruding from the body wall called the…
scrotum
During the descent of the testes, everything gets dragged down. This includes…
ductus deferens, nerves, blood vessels (arteries and veins)
What consists of the spermatic cord?
ductus deferens, nerves, arteries, veins, lympathics
Homolog…
Skin:
scrotal sac
Homolog…
Superficial fascia:
dartos muscle
Homolog…
External oblique:
external spermatic fascia
Homolog…
Internal oblique:
cremaster muscle
Homolog…
Transversus abdominus:
internal spermatic fascia
Homolog…
Coelom + peritoneum:
tunica vaginalis
What is the ligament that descends on each side of the abdomen from inferior pole of gonad?
gubernaculum
*serves as a guide for the testes pathway
What is labioscrotal swelling?
future position of:
scrotum in males
labium majus in females
The spermatic cord passes through an “opening” to the scrotal pouch. If it were wide open, what could happen?
herniation of gut tube
What keeps herniation from happening?
the inguinal canal; a very narrow slit
The testes descend and place the ductus deferens in a position just __________ to the ureter.
ventral
The distal end bit that attaches to the testis is called the…
epididymis
A specialized tube runs from the ovary to the embryonic cloaca. It is called the…
paramesonephric duct
What does the paramesonephric duct do?
it is plastered over the ovary so that when an egg is shed from the ovary, it doesn’t escape into the coelom
The caudal ends of the right and left paramesonephric ducts fuse near the entrance into the embryonic cloaca to become what?
the uterus and vagina
The remaining unfused parts are then known as what?
the uterine tubes or salpinx or fallopian tubes
What anchors the ovary to lateral uterine wall?
ovarian ligament (proper ligament of ovary)
What connects the uterus to labia majora?
round ligament of the uterus
What is the sheet of connective tissue that supports the uterus laterally as well as fallopian tube and ovary out to lateral body wall?
broad ligament
- mesosalpinx
- mesometrium
- mesovarium
- suspensory ligament of the ovary
The ovary descends by following a ___________ but it does not exit into an extra-abdominal position like the testes.
gubernaculum
The ovary’s gubernaculum persists in the adult as a pair of fibrous cords that run through what? and inserts into what?
vestigal inguinal canal
labia majora
