urethra的意思|urethra的解释-里氏词典

urethra [,juә'ri:θrә]

n. 尿道

[医] 尿道

urethra
urethrae

[ noun ]
duct through which urine is discharged in most mammals and which serves as the male genital duct
<noun.body>

Urethra \U*re"thra\, n. [L., fr. Gr. ?. See {Urine}.] (Anat.)
The canal by which the urine is conducted from the bladder
and discharged.

Cancer of the prostate gland, which is at the base of the urethra, commonly afflicts older men.
The microwaves are emitted by a specially-designed radio-frequency antenna inserted along the urethra. To keep its effect localised within the prostate, iced water circulates through the catheter carrying the antenna.
Meanwhile, surgeons are experimenting with injecting such substances as collagen or Teflon to compress and support the sphincter muscle, which controls the opening of the bladder to the urethra.
This constricts the urethra, slowing urine flow and making it impossible to empty the bladder completely. In only a small proportion of cases - about one in 27 - is cancer involved. For most, the swelling is benign.
Because it surrounds the urethra, it has the potential to block the flow of urine completely.
The surgery, which removed nearly an ounce of tissue, was to relieve what a spokesman called "mild, recurring discomfort" apparently due to an enlarged prostate, a gland surrounding the urethra at the base of the bladder.

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