Urination - Wikipedia In females the need to urinate is felt in the lower abdomen region when the bladder is full When the bladder becomes too full, the sphincter muscles will involuntarily relax, allowing urine to pass from the bladder
The Urinary Tract How It Works - NIDDK To urinate, your brain signals the sphincters to relax Then it signals the muscular bladder wall to tighten, squeezing urine through the urethra and out of your bladder
Urine and Urination - MedlinePlus 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
Urine: Urination, Composition, Production, Color Odor Your bladder holds your urine until you’re ready to use the restroom (urinate) Your bladder squeezes (contracts) and urine flows through your urethra and out of your body
What Causes Frequent Urination and How to Fix It Frequent urination means needing to go more often than usual It can happen during the day or at night, when it's called nocturia Urinary frequency may occur on its own or with other symptoms, such as fever, pain, or increased thirst