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* This is often at the vestibulo vaginal junction
 
* This is often at the vestibulo vaginal junction
 
* Only urine passes through it
 
* Only urine passes through it
* The urethral submucosa has a network of veins which may contribute to continence by forming a kind of erectile tissue.
   
* Length and diameter is species specific
 
* Length and diameter is species specific
 
** Short and wide - mare
 
** Short and wide - mare
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