[ANAT] BLADDER Flashcards
embryological origin of bladder
endodermal
embryological origin of trigone
mesodermal
position of bladder in adults
pelvic
abdominal when full
position of bladder in children
abdominal
when does bladder sink to pelvis
puberty
capacity
300-500ml
apex relation
behind symphsis pubis
apex is connected to ant abdominal wall by
median umbilical ligament
median umbilical ligament arises from
obliterated urachus
base relations in males (3)
1-ampulla of vas
2-seminal vesicles
⤷separate base from rectum
3-recto-vesical pouch
base relations in female
vagina & cervix
surface covered by peritoneum
superior
surface devoid of peritoneum
inferolateral surfaces
superior surface relations in males
sigmoid colon
loops of ileum
superior surface relations in females
1-uterus
2-loops of ileum in utero-vesical pouch
inferolateral surface relations
1-obturator internus
2-levator ani
bladder is separated from obturator internus & levator ani by
retropubic fat
neck relation in male
1-behind symphysis pubis
2-rests on prostate base
neck is continuous w/
urethra
neck is pierced by
internal urethral meatus
neck relations in female
behind symphysis pubis
annular smooth msc around neck of bladder
internal urethral sphincter
true ligaments
1-lateral pubo-vesical/pubo-prostatic ligament
2-medial pubo-vesical/pubo-prostatic ligament
3-median umbilical ligament
false ligaments
1-median umbilical fold
2-medial umbilical fold
3-lateral umbilical fold
median umbilical fold covers
median umbilical ligament
medial umbilical fold covers
obliterated umbilical artery
lateral umbilical fold covers
inferior epigastric artery
mucosa in empty bladder shows
rugae
most fixed part of bladder
neck
trigone bounded by
2 ureteric orifices
internal urethral orifice
mucosa of trigone cc
more vascular & sensitive than rest of bladder
firmly adherent to underlying muscle layer
ureteric orifices shape
crescentic slits
apex of trigone formed by
internal urethral orifice
uvula vesicae formed in?
by?
BPH
raising of mucosa behind internal urethral orifice due to bulging of prostate median lobe
arterial supply
♂: superior vesical & inferior vesical arteries
♀: inferior vesical & vaginal arteries
+ obturator a, middle rectal, inferior gluteal a
venous supply
♂: vesico-prostatic venous plexus
♀: vesico-vaginal venous plexus
venous plexus supplying bladder originates from
internal iliac vein
LN supply
external iliac
+obturator LNs, internal iliac LNs, common iliac
LNs
parasympathetic supply
S2
S3
S4
parasympathetic supply function
contract wall
relax sphincter
= MICTURITION
sympathetic supply
T11-L2
sympathetic supply function
relax wall
contract sphincter
= RETENTION
sensory supply function
distention
pain
external sphincter nerve supply
pudendal nerve:
S2
S3
S4
micturition facilitated by
parasympathetic fibers
retention facilitated by
sympathetic fibers
pudendal n (external sphincter)
space b/w bladder & post surface of pubic bones
retropubic space
floor of retropubic space is formed of
median pubo-prostatic/ pubo-vesical ligaments
sides of floor of retropubic space is formed of
lateral pubo-prostatic ligaments
retropubic space permits
bladder distention in rupture of bladder
in case of ruptured bladder, urine accumulates in
retropubic space
retropubic space is filled w/
retropubic fat
retropubic space is continuous superiorly w/
extraperitoneal fat of ant abdominal wall