sphincter urethrae
The doctor can fix that.
The kidneys each have a ureter that goes to the urinary bladder. One urethra goes from the urinary bladder to the outside surface of the body. Sphincters (ring-like muscles) control the opening and closing of the urethra.
In males: Assist emptying of urethra and assists in erection of penis. In females: Constricts vagina and assists in erection of clitoris
There is not one simple answer. There are a multitude of reasons your trunk closing assist does not work. In the MB S500 the doors are close assisted and they operate on the same system as the trunk. Do the door close assists work and the trunk not? Broad questions get broad answers. You can go to the related link to learn much about how the closing assist works on the S series of MB.
the urethra
The prostatic or membranous urethra
prostatic urethra
Dilating the urethra is done when there is a stricture (abnormal narrowing) of the urethra in order to make the urethra wider.
The urethra.
The urethra; it is located between the clitoris and the vaginal introitus in the vulva.
urethra basically near the penis but its the urethra
Urethra has three regions in males, the prostatic urethra, membranous urethra, and the spongy urethra.