Male Internal Genital Organs Flashcards
What begins at the tail of epididymis in scrotum?
ductus deferens
does the ductus deferens have a thick muscular wall?
yes and very small luminal diameter
the ductus deferens ascends in _______ and passes thru ___________ then crosses over external iiac AV and ureters
spermatic cord; inguinal canal
Does the ductus deferens remain extraperitoneal?
yes in pelvis
What does the the ductus deferens join to form the ejaculatory duct?
duct of seminal vesicle
What forms the ejaculatory duct?
duct of seminal vesicle and ductus deferens
Where does the ductus deferens join the seminal vesicle relative to urinary bladder?
posteroinferior to urinary bladder fundus
What is the ampulla of the ductus deferens?
enlargement of ductus deferens just prior to formation of ejaculatory duct
Where is the ampulla of the ductus deferens located relative to seminal vesicle
medial to ipsilateral seminal vesicle
Where is spermatozoa located?
in ampulla, ductus deferens and epididymis
What arteries supply the ductus deferens?
from either superior or inferior vesical a
What is the sympathetic innervation to the ductus deferens?
lumbar splanchnic n and hypogastric plexuses
What happens as a result of symapthetic innervation to ductus deferens?
faciliate rapid contraction for expulsion of sperm during emission
what is the parasympathetic innervation to the ductus deferens?
via pelvic splanchnic n and hypogastic plexuses
function of parasympathetic to ductus deferens?
uncertain
Where are the seminal vesicles found?
between fundus of urinary bladder and rectum
where are the seminal vesicles in relation to the prostate?
superior to prostate, obiquely placed
What covers the seminal vesicles superiorly?
parietal peritoneum
what separates the seminal vesicles from the rectum?
by inferior part of rectovesical pouch
Inferiorly the seminal vesicles are associated with ________
rectum
can you palpate the seminal vesicles?
yes, enlarged ones are palpable during digital rectal examination
Ductus deferens passes by seminal vesicle on _____ side
medial
What does the seminal vesicles secrete?
thick, alkaline fluid which mixes with sperm to form semen
the fluid from the seminal vesicles accounts for what % of semen volume?
80%
Why is fructose in the semen produced by the seminal vesicles?
to provide as an energy source for spermatozoa
how are secretions added from the seminal vesicles?
by muscular contraction in wall of gland
What is the vascular supply to seminal vesicles?
inferior vesical AV
What supplies sympathetic innervation to the seminal vesicles?
lumbar splanchnic N and hypogastric plexuses
What is the function of sympathetic innervation to the seminal vesicles?
produces contraction in seminal vesicles during emission/ ejects secretions
where does the ejaculatory duct start?
begins at union of ductus deferens with duct from seminal vesicle
What is the length of the ejaculatory duct?
2.5cm long
How does the ejaculatory duct pass relative to the posterior prostate?
anteroinferiorly thru posterior prostate
Where do the ejaculatory duct converge and open?
on seminal colliculus, just inside opening of prostatic utricle
What is the vascular supply to the ejaculatory duct?
inferior vesical a
what is the innervation of ejaculatory duct?
autonomics via inferior hypogastric plexuses
What is the largest gland of male reproductive system?
prostate, 3 cm walnut sized
What fraction of prostate is glandular and fibromuscular?
2/3- glandular
1/3- fibromuscular
What does the prostate surround?
prostatic urethra
What surrounds the prostate?
dense fibrous capsule
What is the base of the prostate adjacent to?
neck of urinary bladder
What is the apex of the prostate adjacent to?
deep perineal muscles and external urethral sphincter
What is the prostate associated with anteriorly?
retropubic space
What is the prostate associated with posteriorly?
rectum
Which prostate lobe is basically a superior continuation of external urethral sphincter?
anterior lobe
What lobe of prostate is a fibromuscular section located anterior to urethra?
anterior lobe
Does the anterior lobe contain glandular tissue?
contains little or no glandular tissue
which lobes of the prostate are on either of prostatic urethra?
lateral lobes
which prostate lobe contains majority of prostatic glandular tissue?
lateral lobes
Which prostatic lobe is most prone to metastatic transformation?
lateral lobes
Where is the posterior lobe of the prostate located?
posterior to prostatic urethra and inferior to ejaculatory ducts
Can you palpate the posterior lobe?
yes readily palpable by digital rectal exam
Which lobe is located between prostatic urethra and ejactulatory ducts?
middle lobe of prostate
Where is the middle lobe relative to the urinary bladder?
immediately inferior to neck of urinary baldder, located between uvula of urinary bladder
Which prostatic lobe is most prone to benign hypertrophy?
middle lobe
What opens into prostatic sinuses on either side of seminal colliculus?
prostatic ducts
Are there a lot of prostatic ducts?
yes 20-30 that open into prostatic sinuses
What % of semen volume comes from the prostate?
20%
describe the prostatic secretions?
thin, milky fluid with enzymatic activity
Where does the prostate a branch from?
inferior vesical a
What is the vascular supply to the prostate?
prostatic a
What is the sympathetic innervation of prostate?
lumbar splanchnic n and inferior hypogastric plexus
What is the function of sympathetic innervation to prostate?
produces contraction in prostate during emission - ejects secretions
What is the parasympathetic innervation of prostate?
pelvic splanchnic nerves S2-S4
what is the function of sympathetic innervation to prostate?
unclear, innervate erectile bodies of penis and responsible for penile erection
