detrusor muscle

The detrusor muscle is a smooth muscle in the wall of the bladder that contracts to push urine out during urination. When the bladder fills with urine, the detrusor muscle relaxes to allow the bladder to expand. When it's time to urinate, the muscle contracts to squeeze the urine through the urethra and out of the body. It works automatically without conscious effort, coordinating with the nervous system to control urination smoothly. Proper functioning of this muscle is essential for normal bladder control and emptying.