Changes

** When full and distended the folds dissapear and the wall appears thinner

** When full and distended the folds dissapear and the wall appears thinner

*** It then becomes intraperitoneal in the larger species

*** It then becomes intraperitoneal in the larger species

* The paired '''uteric folds''' are visible even when the bladder is full.

* The '''trigone''' of the bladder gets its name as it looks like a triangle without a base.

** They extend from the ureteral opening to the neck of the bladder

** Here they merge

** It is visible even when the bladder is full

** Forms the urethral crest - continues into the urethra

** The folds extend from the urethral opening to the neck of the bladder

** The triangular space they form is called the trigone and is of differant embryological origin to the rest of the wall.

** Where they merge

** It is of differant embryological origin to the rest of tissue.  More details can be found [[Developmental Anatomy of the Kidneys and Urinary Tract - Anatomy & Physiology#The Bladder|here]]

==Muscles of the Bladder==

==Muscles of the Bladder==