lect 5 pelvis (urinary system-pelvic portion) Flashcards
what are the places that the ureters are normally constricted
at the junction of the ureters and renal pelves, where the ureters cross the brim of the pelvic inlet, during their passage through the wall of the urinary bladder
what are the inferior ends of the ureters surrounded by
vesical venous plexus
what is the only structure in males that passes between the ureter and the peritoneum
ductus deferens
describe the relationship between the ureter and the ductus deferent
it lies posterolateral to the ductus deferens and enters the posterosuperior angle of the bladder, just superior to the seminal gland
what is the urinary bladder characterized by
distensibility
where is the adult urinary bladder located when it is empty
in the lesser pelvis, lying partially superior to and partially posterior to the pubic bones
where is the urinary bladder located in infants and young children
in the abdomen even when empty
at what age does the bladder usually enter the greater pelvis
by 6 years of age
when does the bladder become located within the lesser pelvis
not until after puberty
how is the fundus of the bladder and the rectum separates in males
centrally by only the fascial rectovesical septum and laterally by the seminal glands and ampulla of the ductus deferens
what are the walls of the bladder chiefly composed of (muscle)
detrusor muscle)
what is the main arterial supply to the bladder
branches of the internal iliac arteries
what arteries supply the anterosuperior parts of the bladder
superior vesical arteries
what arteries supply the fundus and neck of the bladder
inferior vesical arteries
where does lymph from the superolateral aspects of the bladder pass to
external iliac lymph nodes
where does the lymph from the neck and fundus of the bladder drain
internal iliac lymph nodes
what provides motor innervation to the detrusor muscle
parasympathetic fibers
what type of sensory fibers are from the bladder
visceral
what does rupture of the superior part of the bladder frequently tear
the peritoneum, resulting in extravasation (passage) of urine into the peritoneal cavity
what provides an exit for semen
urethra
what is the most prominent feature of the prostatic urethra
urethral crest
what is the rounded eminence in the middle of the urethral crest with a slit-like orifice that opens into the prostatic utricle
seminal colliculus
what is the prostatic utricle the vestigial remnant of
the embryonic uterovaginal canal
what are the 2 proximal parts of the urethral arterial supply
branches of the inferior vesicle and middle rectal arteries
where is the external urethral orifice located in females
in the vestibule, directly anterior to the vaginal orifice
describe the location and axis of the urethra in reference to the vagina
urethra lies anterior to the vagina and its axis is parallel to that of the vagina
what female structure is homologous to the prostate in males
paraurethral glands
what supplies arterial blood to the female urethra
internal pudendal and vaginal arteries
what is the nervous supply to the urethra
arise from the vesicle (nerve) plexus and the pudendal nerve
