what is the urethra
Urethra. This tube allows urine to pass outside the body. The brain signals the bladder muscles to tighten, which squeezes urine out of the bladder. At the same time, the brain signals the sphincter muscles to relax to let urine exit the bladder through the urethra.
What is a urethra in a woman? Overview. The female urethra is a relatively simple tubular structure that has the sole purpose of conducting urine from the bladder to the outside of the body.
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