Your urinary system is composed of your kidneys, ureters, bladder and urethra .
The muscles beneath the bladder that surround the urethra are called the pelvic floor muscles.
If this happens, a tube is put into your urethra to empty your bladder.
This is a long, thin telescope instrument with a light and lens on the end, which is passed into the bladder through the urethra .
If a stone is lodged in the ureter, a flexible narrow instrument called a cystoscope can be passed up through the urethra and bladder.
Your prostate is a small doughnut-shaped gland with the urethra , which carries urine from the bladder, running through the middle of it.
Very rarely, the urethra or bladder may be damaged or perforated.
This chapter focuses on infections of the male urethra , epididymis, testis, and prostate.
When you urinate, the muscles around the urethra relax and the bladder tightens to squeeze urine out.
This is when a thin tube is inserted into the urethra up to the bladder to get a ‘clean’ urine sample.