Editing Urinary system (section)

===Urination===
{{main|Urination}}

Urination, also sometimes referred to as micturition, is the ejection of [[urine]] from the [[urinary bladder]] to the outside of the body. Urine is ejected through the [[urethra]] from the [[penis]] or [[vulva]] in [[Placentalia|placental mammals]] and through the [[cloaca]] in other [[vertebrate]]s. In healthy humans (and [[Urination#Animals|many other animals]]), the process of urination is under voluntary control. In infants, some elderly individuals, and those with neurological injury, urination may occur as an involuntary [[reflex]]. Physiologically, micturition involves coordination between the [[central nervous system|central]], [[autonomic nervous system|autonomic]], and [[somatic nervous system]]s. Brain centers that regulate urination include the [[pontine micturition center]], [[periaqueductal gray]], and the [[cerebral cortex]].