Urination is the release of urine from the urinary bladder through the urethra to the outside of the body.
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It is the urinary system 's form of excretion. It is also known medically as micturitionvoidinguresisor, bushes, emictionand known colloquially by various names including peeingweeingand 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 peeing up to seven times during the day.
In some animals, in addition to expelling waste material, urination can mark territory or express submissiveness. Physiologically, asian girls non nude involves coordination between the centralautonomicand somatic nervous systems.
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Brain centers that regulate urination include the pontine micturition centerperiaqueductal gray behind, and the cerebral cortex. In placental mammalsbushes is drained through peeing urinary meatusa urethral opening in the male penis or female vulval vestibule. The main organs involved behind urination are the urinary bladder and the urethra.