Lecture 31: Pelvis and Perineum IV Flashcards
what 2 things do the testes do
spermatogenesis and steroidogenesis
what is the outer covering of testes
visceral vaginal tunic
what is 2
capsule (tunica albuginea is underneath)
what is 3, what is 4?
3 = parenchyma
4 = mediastinum testis
what is 5
seminiferous tubules
what is 6?
interstitial tissue
what is 7?
rete testis
what is 8?
efferent ducts
what is the blood supply to the testes
testicular artery and vein
what is the function of the epididymis?
mature (head and body) and store sperm (tail)
what is 1
head (caput)
what is 2
body (corpus)
what is 3
tail (cauda)
what is 4
efferent ducts
what is 5
ductus deferens
what is 6
ligament of epididymis tail
the body of the epididymis is always located at the ____ side of ductus deferens
lateral
what is 1?
ductus deferens and nerve
what is 5
testis
what is 6
epididymis
what is 6
scrotal septum
what is the blood supply to the scrotum
external pudendal a
what is the innervation to the scrotum
-lumbar nerves
-iliohypogastric nerve
- ilioinguinal nerve
- genitofemoral nerve
what lymph nodes do the spermatic cord and scrotum drain to
deep and superficial inguinal nodes
what structures are responsible for the cooling of the testes, for the warming?
cooling - pampiniform plexus & thin scrotal skin
warming - dartos and cremaster
what are the two phases of testicular descent and what is it caused by (2 things)
abdominal and extra-abdominal descent
caused by gubernaculum and male hormones
what is gubernaculum
a band of mesenchymal tissue
what occurs in intra-abdominal descent phase
reduction in the length of the gubernaculum
dependent more on INSL3 (insulin like peptide 3)
what occurs in extra-abdominal descent phase
an increase in the thickness of the gubernaculum and a reduction in the length again
more dependent on androgens
what does the visceral vaginal tunic form
spermatic cord
what is found in the spermatic cord
- ductus deferens and nerve
- testicular blood and lymph vessels
- visceral vaginal tunic
what is the cremaster an extension of
the internal abdominal oblique
cremaster origin
internus abdominis at the inguinal ring
what is the action of the cremaster?
raises the testes during cold weather, arousal, copulation and fighting
