Lecture 31: Pelvis and Perineum IV

Question 1

what 2 things do the testes do

Answer 1

spermatogenesis and steroidogenesis

Question 2

what is the outer covering of testes

Answer 2

visceral vaginal tunic

Question 3

what is 2

Answer 3

capsule (tunica albuginea is underneath)

Question 4

what is 3, what is 4?

Answer 4

3 = parenchyma
4 = mediastinum testis

Question 5

what is 5

Answer 5

seminiferous tubules

Question 6

what is 6?

Answer 6

interstitial tissue

Question 7

what is 7?

Answer 7

rete testis

Question 8

what is 8?

Answer 8

efferent ducts

Question 9

what is the blood supply to the testes

Answer 9

testicular artery and vein

Question 10

what is the function of the epididymis?

Answer 10

mature (head and body) and store sperm (tail)

Question 11

what is 1

Answer 11

head (caput)

Question 12

what is 2

Answer 12

body (corpus)

Question 13

what is 3

Answer 13

tail (cauda)

Question 14

what is 4

Answer 14

efferent ducts

Question 15

what is 5

Answer 15

ductus deferens

Question 16

what is 6

Answer 16

ligament of epididymis tail

Question 17

the body of the epididymis is always located at the ____ side of ductus deferens

Answer 17

lateral

Question 18

what is 1?

Answer 18

ductus deferens and nerve

Question 19

what is 5

Answer 19

testis

Question 20

what is 6

Answer 20

epididymis

Question 21

what is 6

Answer 21

scrotal septum

Question 22

what is the blood supply to the scrotum

Answer 22

external pudendal a

Question 23

what is the innervation to the scrotum

Answer 23

-lumbar nerves
-iliohypogastric nerve
- ilioinguinal nerve
- genitofemoral nerve

Question 24

what lymph nodes do the spermatic cord and scrotum drain to

Answer 24

deep and superficial inguinal nodes

Question 25

what structures are responsible for the cooling of the testes, for the warming?

Answer 25

cooling - pampiniform plexus & thin scrotal skin warming - dartos and cremaster

Question 26

what are the two phases of testicular descent and what is it caused by (2 things)

Answer 26

abdominal and extra-abdominal descent caused by gubernaculum and male hormones

Question 27

what is gubernaculum

Answer 27

a band of mesenchymal tissue

Question 28

what occurs in intra-abdominal descent phase

Answer 28

reduction in the length of the gubernaculum dependent more on INSL3 (insulin like peptide 3)

Question 29

what occurs in extra-abdominal descent phase

Answer 29

an increase in the thickness of the gubernaculum and a reduction in the length again more dependent on androgens

Question 30

what does the visceral vaginal tunic form

Answer 30

spermatic cord

Question 31

what is found in the spermatic cord

Answer 31

- ductus deferens and nerve - testicular blood and lymph vessels - visceral vaginal tunic

Question 32

what is the cremaster an extension of

Answer 32

the internal abdominal oblique

Question 33

cremaster origin

Answer 33

internus abdominis at the inguinal ring

Question 34

what is the action of the cremaster?

Answer 34

raises the testes during cold weather, arousal, copulation and fighting