Urination
Urination is the release of urine from the urinary bladder through the urethra to the outside of the body. It is the urinary system's form of excretion. It is also known medically as micturition, voiding, uresis, or, rarely, emiction, and known colloquially by various names including peeing, weeing, and pissing.

In healthy humans (and 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 a reflex. It is normal for adult humans to urinate up to seven times during the day.

In some animals, in addition to expelling waste material, urination can mark territory or express submissiveness. Physiologically, urination involves coordination between the central, autonomic, and somatic nervous systems. Brain centres that regulate urination include the pontine micturition center, periaqueductal gray, and the cerebral cortex. In placental mammals, urine is drained through the urinary meatus, a urethral opening in the male penis or female vulval vestibule.
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urine
Concept
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urinary bladder
Concept
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urethra
Concept
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urinary system
Concept
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excretion
Concept
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many other animals
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reflex
Concept
None
can mark territory or express submissiveness
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central
Concept
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autonomic
Concept
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somatic nervous system
Concept
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pontine micturition center
Concept
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periaqueductal gray
Concept
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cerebral cortex
Concept
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placental mammal
Concept
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urinary meatus
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penis
Concept
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vulval vestibule
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Urination
Concept
subclass of
connects with
connects with