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==Introduction==

==Introduction==

[[Image:sumlutshcemtri.jpg|right|thumb|350px|<small><center>A schematic overview of the lower urinary tract showing the nerves and muscles involved in micturition</center></small>]]

[[Image:sumlutshcemtri.jpg|right|thumb|350px|<small><center>A schematic overview of the lower urinary tract showing the nerves and muscles involved in micturition</center></small>]]

After entering the renal pelvis the modification of the urine is over in all domestic species other than the horse where mucin is added.  The urine passes along the [[Ureters - Anatomy & Physiology| ureters]] and enters the [[Bladder - Anatomy & Physiology|bladder]].  It is here that the urine is stored until it is to be voided.  Urine is not constantly excreted and it is only when there is a significant amount present in the bladder that the process of voiding occurs.  Both the [[Bladder - Anatomy & Physiology| Bladder]] and the [[Urethra - Anatomy & Physiology| Urethra]] have smooth muscle and thus receive autonomic influence with regard to their activity.  However the urethra also has an element of skeletal muscle giving the animal some degree of conscious control over the voiding of urine.

After entering the renal pelvis the modification of the urine is over in all domestic species other than the horse where mucin is added.  The urine passes along the [[Ureters - Anatomy & Physiology| ureters]] and enters the [[Bladder - Anatomy & Physiology|bladder]].  It is here that the urine is stored until it is to be voided.  Urine is not constantly excreted and it is only when there is a significant amount present in the bladder that the process of voiding occurs.  Both the [[Bladder - Anatomy & Physiology| Bladder]] and the [[Urethra - Anatomy & Physiology| Urethra]] have smooth muscle and thus receive autonomic influence with regard to their activity.  However the urethra also has an element of skeletal muscle giving the animal some degree of conscious control over the voiding of urine.