Part III: Male Internal Genital Organs Pg 100-102 Flashcards
Where does the ductus deferens begin?
The tail of the epididymus
The ductus deferens joins the seminal vesicle to form what?
Ejaculatory duct
The enlargement of ductus deferens just prior to formation of ejaculatory duct
Ampulla
Where is the ampulla of the ductus deferens located relative to the seminal vesicle?
Medial to ipsilateral seminal vesicle
What is the arterial supply to ductus deferens?
Either superior vesical A or inferior vesical A
What is the venous drainage of the pelvic portion of the ductus deferens?
Prostatic venous plexus
What is the lymphatic drainage of the ductus deferens?
External iliac lymph nodes
Sympathetic innervation of the ductus deferens is via:
Lumbar splanchnic N and hypogastric plexus
What is the function of sympathetic innervation to the ductus deferens?
Facilitate rapid contraction for expulsion of sperm during emission
Parasympathetic innervation of the ductus deferens is via:
Pelvic splanchnic N and hypogastric plexuses
What is the function of parasympathetic innervation to the ductus deferens?
Function is uncertain
The obliquely placed glands located superior to prostate and between fundus or urinary bladder and rectum
Seminal vesicle
The seminal vesicles are covered superiorly by:
Parietal peritoneum
The seminal vesicle is separated from rectum by:
Inferior part of rectovesical pouch
The seminal vesicles are closely associated with _____ .
The rectum
What does the seminal vesicle secrete?
A thick, alkaline fluid which mixes with sperm to from semen
How are secretions from the seminal vesicles added the the ejaculatory duct?
By muscular contraction in the wall of the gland
The secretions of the seminal vesicles account for what percentage of semen volume?
80%
What is the vascular supply to the seminal vesicles?
Inferior vesical AV
Lymphatic drainage of the seminal vesicles is to:
Internal iliac lymph nodes
sympathetic innervation of the seminal vesicles is via:
Lumbar splanchnic N and hypogastric plexuses
What is the function of sympathetic innervation to the seminal vesicles?
Produces contraction in seminal vesicle during emission
Parasympathetic innervation of the seminal vesicle is via:
Pelvic splanchnic N and hypogastric plexuses
What is the function of parasympathetic innervation of the seminal vesicles?
Function uncertain
Where does the ejaculatory duct begin?
At the union of ductus deferens with seminal vesicle
The ejaculatory ducts converge and open on _____ just inside the opening of prostatic utricle.
Seminal colliculus
What is the arterial supply to the ejaculatory duct?
Inferior vesical A
What is the venous drainage of the ejaculatory duct?
Via prostatic and vesical venous plexuses
Lymphatic drainage of the ejaculatory duct is via:
Internal iliac lymph nodes
Autonomic innervation of ejaculatory duct is via:
Inferior hypogastric plexus
What is the largest accessory gland of the male reproductive system?
Prostate
2/3 of the prostate gland is _______ and 1/3 is _______.
Glandular
Fibromuscular
What part of the urethra does the prostate gland surround?
Prostatic urethra
The base of the prostate is adjacent to:
The neck of the urinary bladder
The apex of the prostate is adjacent to:
Deep perineal muscles and external urethral sphincter
Anteriorly the prostate gland is associated with ______ and posteriorly with ______.
- retropubic space
- rectum
The fibromuscular section of the prostate that is located anterior to the urethra and contains little or no glandular tissue
Anterior lobe
The lobes of the prostate gland that are located on either side of prostatic urethra and contain the majority of prostatic glandular tissue
Lateral lobes
The lobe of the prostate that is located posterior to prostatic urethra and inferior to ejaculatory ducts
Posterior lobe
Which part of the prostate is readily palpable vis digital rectal exam?
Posterior lobe
Other than the posterior lobe of the prostate, what other male structure can be palpate on digital rectal examination?
Seminal vesicles, especially when enlarged
The lobe of the prostate that is located between the prostatic urethra and ejaculatory ducts, immediately inferior to the neck of the urinary bladder
Middle lobe
What lobe of the prostate is most prone to metastatic transformation? Why?
Lateral lobes
Because the prostatic venous plexus communicates with vesical venous plexus and internal vertebral venous plexus which allows metastasis to spread to vertebral column
What lobe of the prostate is most prone to benign hypertrophy?
Middle (median) lobe
20-30 ducts which open into prostatic sinuses on either side of seminal colliculus
Prostatic ducts
Describe the prostatic secretions?
- Thin, milky fluid with enzymatic activity
- Account for about 20% of semen volume
What is the arterial supply to the prostate?
Inferior vesical A
What is the venous drainage of the prostate?
Drainage is to prostatic venous plexus and then internal iliac V
Lymphatic drainage of the prostate is via:
Internal iliac and sacral lymph nodes
Sympathetic innervation of the prostate is via:
Lumbar splanchnic N and inferior hypogastric plexus
What is the function of sympathetic innervation to the prostate?
Produces contraction in prostate during emission (ejects secretions)
Parasympathetic innervation to the prostate is via:
Pelvic splanchnic nerves (S2-S4)
What is the function of parasympathetic innervation to the prostate?
Function is unclear although the same fibers innervate erectile bodies of penis and are responsible for penile erection.
Bulbourethral glands are also known as:
Cowper’s glands
Small, pea-sized glands located posterolateral to membranous urethra
Bulbourethral glands
Where do the ducts of the bulbourethral gland open into?
Ducts open into proximal part of spongy urethra in bulb of penis
What kind of secretion does the bulbourethral gland produce?
viscous secretion that enters spongy urethra during sexual arousal
The bulbourethral glands in males are analogous to ________ in females.
greater vestibular glands
