Ureter & Urinary bladder, Study notes of Anatomy

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Anatomical &

Topological Location

of Ureter & Urinary

bladder

Diagrammatic structures of

urinary system of ox

Ureter of an ox with renal calices

Ureter & Urinary bladder of

ox-cow

Urinary bladder



Anatomical location:



The urinary bladder is a musculo-membranous

sac, differs in form, size and position according to

the amount of its contents



When contracted, it is a dense pyriform mass

about the size of a fist and lies on the ventral wall

of the pelvic cavity at a variable distance behind

the pelvic inlet



When moderately full, it is oval in shape and

extends into the abdominal floor.



Its capacity is about 3 to 4 litres.



Topographical location :

 The bladder has 3 parts-a vertex, a body and neck



The cranial part or the vertex is a blind end and presents

in its middle a rounded cul-de-sac called as cicatrix - the

vestige of the urachus, which forms a connection

between the bladder and the allantois in the fetus

 The middle part or body is rounded and somewhat

flattened from above downwards

 It presents two surfaces- superior and inferior which are

convex when full



The caudal narrow extremity is the neck and it joins

the urethra

Parts of Urinary bladder

Relations-Urinary bladder

 They vary according to the amount of the contents and sex.  The ventral surface is related to the floor of the pelvis and extends into the abdomen as it distends.  The dorsal surface in the male is related to the rectum, the genital fold, and the terminal parts of the vas deferens, the seminal vesicle and the prostate.  In the female, it is related to the body of uterus and vagina. When the bladder is full, the vertex reaches the rumen and small intestine.