Anatomy of urinary bladder in urinary system

 URINARY BLADDER :-

introduction :- 

-it is a muscular reservoir of urine present in the true pelvic behind pubic symphysis.

-it lies between pubic symphysis and rectum in male and between pubic symphysis and uterus in female .

-full bladder comes in abdomen above the pubic symphysis .

location and shape :- 

-the urinary bladder is situated in the anterior part of the behind the pelvic immediately behind the pubic symphysis and in front of rectum in male uterus in the female .

shape:-

-it is pear shaped structure having thick muscular wall linked by transitional epithelium that allow expansion.

                                                             

capacity :-

-normally in adult male the capacity various from 120 to 320 ml .

- the mean capacity is about 220 ml .

relations bladder  :-

1) superior surface :-

- peritoneal cavity 

-coils of ileum 

-sig moid colon 

-uterine cervix in female 

2) Anterior surface :-

-retropubic space 

-puboprostatic ligaments 

ligament :-

1) lateral ligaments two in number right and left .

2) puboprostatic ligament fair in number two on each side lateral &medial .

3)median umbilical ligament.

4) posterior ligament two in number 4 left .

5) anterior there are three fold ( female )

6) laterally a pair of false lateral ligament 

7) posterior a pair of false posterior ligament .

                                                                   

    

                                                                   

Apex :-

- median umbilical ligament 

neck :- 

- prostate gland ( in male ) urogential diaphragm ( female ) 

Base :-

- it form posterior surfaces pouch in the ( male ) 

- vaslco uterine pouch in the ( female ) 

blood supply of urinary bladder :- 

Aetrial supply :--

-main arterial supply :-- superior and inferior vesical arteries arise from the anterior trunk of internal illac arteries >

Additional arterial supply :- obturator and inferior gluteal arteries .in the female uterine and vaginal arteries .

-the inferior vesical artery in female is called vaginal artery .

venous drainage :- 

- drained by vesical venous plexus lying on the inferolateral surfac .vein from this plexus drains into internal illiac vein.

Nerve supply :- 

- sympathetic fibers derived from T10 L 1 segment and parasympathetic fibers from vagus nerve .