Urinary bladder Flashcards
site of urinary bladder
- Empty: Lesser pelvis
- distended: pelvi-abdominal
Shape of Urinary bladder
- Apex
- base
- Superior surface
- 2 infero-lateral surfaces
- Neck
relations of Apex of urinary bladder
- Symphysis pubis (it lies behind it)
- apex is continuous woth Median umbilical ligament
relations of Base of urinary bladder
male 🚹:
* seperated from rectum by recotvesical pouch containing coils of colon & Ilium
* 2 Ampulla of vas deferens
* 2 seminal vesicles
* Denonviller fascia
Female 🚺:
* Anterior vaginal wall
* supravaginal cervix
Relations of superior surface of urinary bladder
- Peritoneum
- ureters join posterior angel of superior surface
Male 🚹:
* Sigmoid colon
* coils of ileum
Female 🚺:
* utero-vescical pouch
* uterus
* supravaginal cervix (with fibroareolar tissue in between)
relations of the 2 infero-lateral surfaces of urinary bladder
In front: retro-pubic fat
posteriorly:
* Obturator internus (above)
* Levator ani (below)
Neck of urinary bladder gives attachement to
🚹: Pubo-prostatic ligament
🚺: pubo-urethral ligament
both are also known as pubo-vesical ligaments
relations of neck of urinary bladder
🚹:
* lies directly on protstate
* continuous with prostatic urethra
* gives attachement to pubo-prostatic ligament
🚺:
* Lies directly on pelvic fascia
* Continuous with urethra
* Gives attachement to pubo- urethral ligament
Peritoneal covering Of urinary bladder
🚹: superior surface & uppermost part of base (periotoneum then passes laterally to form right and left paravesical fossae)
🚺: superior surface only, (periotoneum then passes laterally to form right and left paravesical fossae)
Enumerate ligaments of Urinary bladder
- Median umbilical Ligament
- Medial umbilical ligaments
- Pubovesical (puboprostatic or pubourethral) Ligament
- Lateral ligaments
- Posterior ligaments/ sacrogenital folds
Attachement of median umbilical ligament
from apex of urinary bladder to umbilicus
fibrosed urachus
Attachement of medial umbilical ligaments
from superior surface of bladder towards umbilicus
2 obliterated umbilical Arteries
Attachements of pubovesical ligaments
from pubic bone to neck of urinary bladder
Attachements of lateral ligaments of urinary bladder
they are lateral peritoneal reflections extending towards lateral wall of pelvis
all mucosa of urinary bladder is endodermal in origin except ___
Mucosa of trigone, it’s mesodermal in origin
Interior structures of Bladder is made up of:
Mucous memebrane:
* wrinkled when empty forming folds (rugae), not sensitive to pain
Trigone:
* bounded by internal urtheral orifice below and 2 ureteric orificies superolateraly
* Sensitive to pain
* pink (pale vascular)
* mucosa is mesodermal in origin
2 Ureteric orifices:
* At the 2 superolateral angles of the trigone
* slit like
* muscular ridge extending between the 2 orifices know interureteric crest, forming upper boundary of trigone
Internal urethral orifice:
* lies in apex of trigone
* small elevation behind it in adult males caused by median lobe of prostate (uvula of prostate)
Describe Arterial supply of urinary bladder
Superior surface = Superior vesical A:
* from proximal patent part of umbilical A of Internal ilac A
Infero-lateral surface = Inferior vesical A 🚹/ Vaginal A & uterine A 🚺:
+ Branches from obturator A
Venous drainage of urinary bladder
Vesical Venous plexus (in fascia surrounding bladder) —> Internal iliac vein
Lymph drainage of Urinary bladder
- Upper part –> external iliac LNs
- Lower part –> Internal Iliac LNs
- some from neck –> sacral LNs
Parasympathetic Nerve supply of bladder & its action
S2,3,4 along pelvic splanchnic N
Action: contract wall of bladder, relax sphincter
sympathetic Nerve supply of bladder & its action
T10-L2
Action: relaxes wall of bladder, contract sphincter
