(final) Lecture 15 (6/1/16) PT. 1

Question 1

How do gonads develop?

Answer 1

in a retroperitoneal position (to dorsal body wall)

Question 2

What germ layer are gonads derived from?

Answer 2

intermediate mesoderm

Question 3

The testis take over the mesonephric duct for itself and it ends up becoming what?

Answer 3

spermatic duct (ductus deferens or vas deferens)

Question 4

Male testes descend from their initially retroperitoneal position, through the body wall, into a pouch protruding from the body wall called the…

Answer 4

scrotum

Question 5

During the descent of the testes, everything gets dragged down. This includes…

Answer 5

ductus deferens, nerves, blood vessels (arteries and veins)

Question 6

What consists of the spermatic cord?

Answer 6

ductus deferens, nerves, arteries, veins, lympathics

Question 7

Homolog…

Skin:

Answer 7

scrotal sac

Question 8

Homolog…

Superficial fascia:

Answer 8

dartos muscle

Question 9

Homolog…

External oblique:

Answer 9

external spermatic fascia

Question 10

Homolog…

Internal oblique:

Answer 10

cremaster muscle

Question 11

Homolog…

Transversus abdominus:

Answer 11

internal spermatic fascia

Question 12

Homolog…

Coelom + peritoneum:

Answer 12

tunica vaginalis

Question 13

What is the ligament that descends on each side of the abdomen from inferior pole of gonad?

Answer 13

gubernaculum

*serves as a guide for the testes pathway

Question 14

What is labioscrotal swelling?

Answer 14

future position of:
scrotum in males
labium majus in females

Question 15

The spermatic cord passes through an “opening” to the scrotal pouch. If it were wide open, what could happen?

Answer 15

herniation of gut tube

Question 16

What keeps herniation from happening?

Answer 16

the inguinal canal; a very narrow slit

Question 17

The testes descend and place the ductus deferens in a position just __________ to the ureter.

Answer 17

ventral

Question 18

The distal end bit that attaches to the testis is called the…

Answer 18

epididymis

Question 19

A specialized tube runs from the ovary to the embryonic cloaca. It is called the…

Answer 19

paramesonephric duct

Question 20

What does the paramesonephric duct do?

Answer 20

it is plastered over the ovary so that when an egg is shed from the ovary, it doesn’t escape into the coelom

Question 21

The caudal ends of the right and left paramesonephric ducts fuse near the entrance into the embryonic cloaca to become what?

Answer 21

the uterus and vagina

Question 22

The remaining unfused parts are then known as what?

Answer 22

the uterine tubes or salpinx or fallopian tubes

Question 23

What anchors the ovary to lateral uterine wall?

Answer 23

ovarian ligament
(proper ligament of ovary)

Question 24

What connects the uterus to labia majora?

Answer 24

round ligament of the uterus

Question 25

What is the sheet of connective tissue that supports the uterus laterally as well as fallopian tube and ovary out to lateral body wall?

Answer 25

broad ligament - mesosalpinx - mesometrium - mesovarium - suspensory ligament of the ovary

Question 26

The ovary descends by following a ___________ but it does not exit into an extra-abdominal position like the testes.

Answer 26

gubernaculum

Question 27

The ovary's gubernaculum persists in the adult as a pair of fibrous cords that run through what? and inserts into what?

Answer 27

vestigal inguinal canal | labia majora