Urinary bladder is the temporary store house of urine. - PowerPoint PPT Presentation

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Urinary bladder is the temporary store house of urine.

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Urinary bladder is the temporary store house of urine. It has an apex directed forwards; a base or fundus, directed backwards, a neck, which is the lowest and – PowerPoint PPT presentation

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Title: Urinary bladder is the temporary store house of urine.


1
Urinary bladder is the temporary store house of
urine. It has an apex directed forwards a base
or fundus, directed backwards, a neck, which is
the lowest and most fixed part of the bladder,
three surfaces, superior, right and left
inferolateral four borders, two lateral ,one
anterior and one posterior.
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Relations 1.the apex is connected to the
umbilicus by the median umbilical
ligament. 2.base is related to uterine cervix and
the vagina in the female, rectum, seminal
vesicles, ampulla of ductus deferens and the
rectovesical fascia of Denonvilliers. 3.the neck
rests on the base of the prostate in male.
In female it is related to the pelvic
fascia. 4.superior surface is covered by
peritoneum. 5.inferolateral surfaces are related
to the pubis, the puboprostatic(or pubovesical )
ligaments, retropubic fat, the levator ani
obturator internus
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Ligaments of the bladder 1.true ligaments.
these are condensations of pelvic fascia,
lateral true ligament extends from the side
of the bladder to the tendinous arch of the
pelvic fascia. The lateral puboprostatic
ligament extend from tendinous arch of the
pelvic fascia to prostatic sheath. The medial
puboprostatic ligament extends from the back of
the pubic bone to the prostatic sheath. The
median umbilical ligament is the remnant of the
urachus. The posterior ligament of the bladder
extends from the base of the bladder to the wall
of the pelvis. 2.false ligaments are peritoneal
folds such as the median umbilical fold and the
medial umbilical fold .
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Interior of the bladder In an empty of bladder,
the greater part of the mucosa shows irregular
folds. in a small area over the Lower part of
the bladder, the mucosa is smooth due to loose
attachment to the muscular coat- trigone of the
bladder The apex of the Trigone is the internal
urethral orifice, the ureters open at the
posterolateral angles of the trigone, the base of
the trigone is formed by the interureteric ridge
or bar of Mercier.
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11
Arterial supply 1.the main supply comes from the
superior and inferior vesical arteries, branches
of the anterior trunk of the Internal iliac
artery. 2.additional supply is derived from the
obturator and Inferior gluteal arteries and in
females from the uterine And vaginal arteries
instead of inferior vesical. Venous drainagea
venous plexus drain into the internal Iliac veins.
12
The male urethra Male urethra is a membranous
canal for the external discharge of Urine and
seminal fluid. It extends from the internal
urethral orifice at the neck of the urinary
bladder to the external urethral orifice at the
tip of the penis. It has three parts, two
curvatures , three Strictures and three
dilatations. Three parts are the prostatic
part,the membranous part and the spongy or
penile part two curvatures are subpubic
curvature and prepubic curvature. The three
strictures are the internal urethral orifice,
membranous part and external orifice of the
urethra three dilatations are the prostatic
part ,intrabulbar fossa and navicular fossa.
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Sphincters of the urethra 1.the internal
urethral sphincter is involuntary in nature. It
is made up of smooth muscles. 2.external
urethral sphincter is voluntary in nature. it is
made up of striated muscle fibres and is
supplied the perineal branch of the pudendal
nerve. The female urethra is short(4cm),broad(6mm
in diameter) straight.
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