Discharge of URINE, liquid waste processed by the KIDNEY, from the body.

Discharge or passage of urine.

(micturition) Emptying the bladder. Also called urination or voiding.

(micturition) The regulation of body fluids process in which parasympathetic nerves stimulate the bladder wall muscle to contract and expel urine from the body.

(micturition) Urination, the act of emptying the bladder of urine.

(urinary function) Production and excretion of urine.

(urine and urination) Your kidneys make urine by filtering wastes and extra water from your blood. The waste is called urea. Your blood carries it to the kidneys. From the kidneys, urine travels down two thin tubes called ureters to the bladder. The bladder stores urine until you are ready to urinate. It swells into a round shape when it is full and gets smaller when empty. If your urinary system is healthy, your bladder can hold up to 16 ounces (2 cups) of urine comfortably for 2 to 5 hours. You may have problems with urination if you have Kidney failure; Urinary tract infections; An enlarged prostate; Bladder control problems like incontinence, overactive bladder, or interstitial cystitis; A blockage that prevents you from emptying your bladder . Some conditions may also cause you to have blood or protein in your urine. If you have a urinary problem, see your health care provider. Urinalysis and other urine tests can help to diagnose the problem. Treatment depends on the cause. NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Voiding disorders affect urine storage or release because both are controlled by the same neural and urinary tract mechanisms. The result is incontinence or retention.

Urination, the process of excreting urine from the urinary bladder. Nerve centres for the control of urination are located in the spinal cord, the brainstem, and the cerebral cortex (the outer substance of the large upper portion of the brain). Both involuntary and voluntary muscles are involved. T...