The movement of urine primarily relies on the action of smooth muscle in the walls of the ureters and the bladder. The ureters use peristaltic contractions to transport urine from the kidneys to the bladder. Once the bladder fills, its smooth muscle, known as the detrusor muscle, contracts to facilitate urination. Additionally, the external urethral sphincter, composed of skeletal muscle, allows for voluntary control over the release of urine.
Smooth muscle surrounding the bladder pushes urine out of the urethra.
The bladder.
The Blader contracting and the Prostate relaxing to allow urine to flow
Smooth muscle tissue is primarily found in the walls of hollow organs and structures within the body. This includes the gastrointestinal tract, blood vessels, the bladder, and the uterus. Unlike skeletal muscle, smooth muscle is involuntary and helps facilitate processes such as peristalsis, blood flow regulation, and the expulsion of urine.
it is the muscle tissue
sphincter
The Bladder Wall
ureter
You could test the urine to see if there are abnormally large numbers of proteins in the urine, this might tell you if muscle is being broken down.
Creatinine
Bones
never