bladder function

The bladder is a hollow, muscular organ that stores and releases urine. It gradually fills with urine produced by the kidneys, stretching as it fills. When it's full, nerve signals alert the brain, creating the urge to urinate. During urination, the bladder muscles contract, and the sphincter muscles relax, allowing urine to flow out through the urethra. The process is controlled by a combination of nerves and muscles to ensure urination happens at appropriate times. Proper bladder function depends on this coordinated system working smoothly to store urine comfortably and empty completely when desired.