|मिजं एनाटोमी। (Urethra opening labeled at bottom left, the bulbo-urethral gland at the base of the penis.)|
|लातिन||मिसा युरेथ्रा: urethra feminina|
मिजं युरेथ्रा: urethra masculina
|Gray's||subject #256 1234|
मिसामनुय् युरेथ्रा १ १/२ निसें २ इञ्च (३-५ सेमि)तक्कया जुइ। थुकिया एक्स्टर्नल ओपनिङ क्लाइटोरिस व भजाइनाया दथुइ जुइ। थ्व सिम्फाइसिस प्युबिसया ल्युने दै व एन्टेरियर भजाइनल वालय् एम्बेडेड जुइ। थुकिया दिशा अब्लिक्ली क्वे व न्ह्यःने जुइ। मिसा युरेथ्रा भतिचा कर्भ्ड जुइ व थुकिया कर्भेचर न्ह्यःने स्वयाच्वंगु जुइ।
मिजंमनुतेगु युरेथ्राया हाकः ८ इञ्च (१७.५-२० सेमि) जुइ। थ्व पेनिसया अन्त्यं पिनेनाप कम्युनिकेट याइ। युरेथ्रां च्व व सेमेनया निकास याइ।
मिजंतेगु युरेथ्रायात ४गु भागय् बायेछिं :
|प्रि-प्रोस्टाटिक युरेथ्रा||This is the intramural part of the urethra and varies between 0.5 and 1.5 cm in length depending the fullness of the bladder.||Transitional|
|प्रोस्टाटिक युरेथ्रा||Crosses through the prostate gland. There are several openings: (1) the ejaculatory duct receives sperm from the vas deferens and ejaculate fluid from the seminal vesicle , (2) several prostatic ducts where fluid from the prostate enters and contributes to the ejaculate, (3) the prostatic utricle, which is merely an indentation. These openings are collectively called the verumontanum.||Transitional|
|मेम्ब्रेनस युरेथ्रा||A small (1 or 2 cm) portion passing through the external urethral sphincter. This is the narrowest part of the urethra. It is located in the deep perineal pouch. The ducts of the bulbourethral glands (Cowper's gland) enter here.||Pseudostratified columnar|
|पेनाइल युरेथ्रा||Runs along the length of the penis on its ventral (underneath) surface. It is about 15-16 cm in length, and travels through the corpus spongiosum. The ducts from the urethral gland (gland of Littre) enter here. Some textbooks will subdivide the spongy urethra into two parts, the bulbous and pendulous urethra.||Pseudostratified columnar - proximally, Stratified squamous - distally|
The length of a male's urethra, and the fact it contains a prominent bend, makes catheterization more difficult.
The epithelium of the urethra starts off as transitional cells as it exits the bladder. Further along the urethra there are stratified columnar cells, then stratified squamous cells near the external meatus (exit hole).
There are small mucus-secreting urethral glands, that help protect the epithelium from the corrosive urine.
Medical problems of the urethraEdit
- Hypospadias and epispadias are forms of abnormal development of the urethra in the male, where the meatus is not located at the distal end of the penis (it occurs lower than normal with hypospadias, and higher with epispadias). In a severe chordee, the urethra can develop between the penis and the scrotum.
- Infection of the urethra is urethritis, said to be more common in females than males. Urethritis is a common cause of dysuria (pain when urinating).
- Related to urethritis is so called urethral syndrome
- Passage of kidney stones through the urethra can be painful and subsequently it can lead to urethral strictures.
Endoscopy of the bladder via the urethra is called cystoscopy.
- Foreign bodies in the urethra are uncommon, but there have been medical case reports of self-inflicted injuries a result of insertion of foreign bodies into the urethra such as an electrical wire .
The male urethra is the conduit for semen during sexual intercourse. It also serves as a passage for urine to flow.