31/32. Pelvic Viscera Flashcards
The parietal peritoneum does not reach the pelvic floor — what is the lowest point in males?
Rectovesical pouch — about 2 cm above the seminal vesicles
[abdominal fluid collects here; abscesses are likely to form here]
Pelvic peritoneum in males descends anterior abdominal wall, with a loose attachment here for insertion of the bladder as it fills. The peritoneum reflects onto the superior surface of the bladder, creating the ________ ______.
Pelvic peritoneum covers the convex superior surface of the bladder and slopes down the sides of roof to ascend lateral wall of pelvis, creating a _____ _____ on each side. It descends th eposterior surface of the bladder as much as 2 cm
Supravesical fossa
Paravesical fossa
The pelvic peritoneum in males — laterally forms folds over what 3 structures?
Ureters (ureteric fold)
Ductus deferens
Superior ends of seminal glands
The pelvic peritoneum reflects from the bladder and seminal glands onto the rectum, forming the _____ _____, which extends laterally and posteriorly to form a _______ _____ on each side of the rectum
Rectovesical pouch; pararectal fossa
The pelvic peritoneum ascends the rectum from inferior to superior, so the rectum is initially subperitoneal, and then __________
It engulfs the sigmoid colon beginning at the ________ junction
Retroperitoneal; rectosigmoid
What is the named space in males between the pubis and bladder?
Retropubic space
What is the named space in males between the rectum and the sacrum?
Retrorectal (presacral) space
What is the named space in males between the bladder and rectum?
Rectovesical pouch/fossa
The levator ani and associated musculature supporting the pelvic floor is weak; what is the named CT assisting in this support?
Endopelvic fascia
The endopelvic fascia exists beneath the peritoneum and covers viscera, pelvic wall, and floor; it is continuous with _____ ______
Endoabdominal fascia
The endopelvic fascia is thickened in certain areas, particularly the tendinous arch of the ____ ____ musculature
Levator ani
The endopelvic fascia forms the _______ ligament in males
It forms the ________ and _______ ligaments in females
Puboprostatic
Pubovesical; pubocervical
The endopelvic fascia forms the lateral ligament of the ____ and _____
Bladder; rectum
The endopelvic fascia forms the ______ ligament which supports the cervix in females
Cardinal (transverse cervical)
The endopelvic fascia forms the _______ in females, which is the thickened fascia from lateral vagina to tendinous arch of levator ani
Paracolpium
In terms of anatomic relationships, the ureter travels _____ the vas deferens
The bladder is _____ to the prostate
The seminal vesicles lie on the _____ surface of the bladder
The bulbourethral gland is located ______ the UG membrane
Under
Superior
Posterior
Within
Where is the prostate located in reference to the bladder and the UG membrane?
The prostate is immediately below the bladder but superior to the UG membrane
The ureters connect the kidneys to the urinary bladder and are retroperitoneal; they pass over the pelvic brim and enter the ______ pelvis. The ureters pass obliquely through the urinary bladder wall in a ________ direction.
Lesser; inferomedial
In males, the ureters run inferior to the ______ ______; in females, they run inferior to the ______ ______
Vas deferens; uterine artery
The ureters receive blood supply from multiple arteries — what are the 4 main branches?
Renal, gonadal, aortic, and internal iliac branches
What nerves supply the ureters?
Preaortic plexus
Hypogastric plexus
Pelvic splanchnics (parasympathetics S2-4)
How is the bladder oriented in terms of apex, fundus, body, and neck?
The apex points toward the pubic symphysis, the fundus just the opposite
The body lies between the apex and fundus, and the neck lies at the bottom
What ligament connects the apex of the bladder to the internal umbilical region? What is the obliterated embryological structure?
Median umbilical ligament (obliterated urachus)
Besides the median umbilical ligament anteriorly, what other ligaments support the bladder?
Lateral ligament (endopelvic fascia)
The superior surface of the bladder is triangular and bounded by a line connecting the _______
Ureters
T/F: the bladder typically rises above the pelvic brim
False; the bladder only rises above the pelvic brim when full — if it is empty it does not
________ muscle lines the bladder walls and is continuous with the ____ _____ sphincter, as well as the _______ sphincters
Detrusor; internal urethral; ureteric
[detrusor m. is visceral smooth m.]
What is the purpose of the sensory receptors in the bladder wall and posterior urethra?
They sense stretch when the bladder fills with urine, and play a role in the micturition reflex
The internal urethral sphincter in males is made up of ________ fibers and is continuous with smooth muscle called the ______ m.
Circular; detrusor
The external urethral sphincter in males is made up of skeletal fibers that are deficient in the _____ region of the urethra. It is located primarily at the level of the _______ urethra in males, but extends superiorly around the _____ urethra
Posterior; membranous; prostatic
What innervates the internal urethral sphincter?
Inferior hypogastric plexus (mixed autonomic supply)
What innervates the external urethral sphincter?
Deep perineal branch of pudendal n. (Somatic innervation)
What are the 4 named parts of the male urethra (from bladder to external)
Intramural
Prostatic
Membranous
Spongy
The _____ ______ is simply a posterior ridge on the urethra as it passes through the prostate.
The ____ ______ is an enlarged area on the above structure onto which the 2 ejaculatory ducts open, bringing sperm from the ____ _____ and fluid from the ____ ____
Urethral crest
Seminal colliculus; vas deferens; seminal vesicle
The ____ ____ is a remnant of the paramesonephric system associated with the prostate gland
The ____ ____ are depressions on either side of the ridge into which prostatic glands open and secrete an alkaline prostatic fluid
Prostatic utricle
Prostatic sinuses
The prostatic urethra is surrounded by the walnut-size prostate, which is made up of 2/3 ______, 1/3 _______ tissue. The base is closely related to the neck of the _______.
Gland; fibromuscular; bladder
The apex of the prostate is in contact with fascia on the superior aspect of the ______ sphincter and deep _____ muscles. Prostatic ducts open chiefly into the ____ ____
Urethral; perineal; prostatic sinuses
What is the largest male reproductive accessory organ?
Prostate