| external opening of urethra | The slitlike opening of the urethra in the glans penis, the external orifice of the urethra (in the female) in the vestibule, usually upon a slight elevation, the papilla urethrae. Synonym: ostium urethrae externum, external opening of urethra, meatus urinarius, orificium urethrae externum. (05 Mar 2000) |
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| opening of external acoustic meatus | The orifice of the external acoustic meatus in the tympanic portion of the temporal bone. Synonym: porus acusticus externus, external acoustic foramen, external acoustic pore, external auditory pore, external auditory foramen, orifice of external acoustic meatus. (05 Mar 2000) |
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| anterior urethra | The portion of urethra distal to urogenital diaphragm (external sphincter). (05 Mar 2000) |
| bulb of urethra | The expanded posterior part of the corpus spongiosum of the penis lying in the interval between the crura of the penis. Synonym: bulbus penis, bulb of corpus spongiosum, bulb of urethra, bulbus urethrae. (05 Mar 2000) |
| male urethra | A canal about 20 cm in length opening at the extremity of the glans penis; it gives passage to the spermatic fluid as well as the urine. Synonym: urethra masculina, urethra virilis. (05 Mar 2000) |
| glands of the female urethra | Numerous mucous glands in the wall of the female urethra. Synonym: glandulae urethrales femininae, Guerin's glands, paraurethral glands, Skene's glands. (05 Mar 2000) |
| glands of the male urethra | Numerous mucous glands in the wall of the penile urethra. Synonym: glandulae urethrales masculinae, Littre's glands. (05 Mar 2000) |
| penile urethra | The portion of the male urethra, about 15 cm in length, which traverses the corpus spongiosum. Synonym: pars spongiosa urethrae masculinae, pars cavernosa, penile urethra, spongy part of the male urethra. (05 Mar 2000) |
| membranous part of male urethra | The portion of the male urethra, about 1 cm in length, extending from the prostate to the beginning of the urethra in the corpus spongiosum just beyond the bulb. Synonym: pars membranacea urethrae masculinae, membranous urethra. (05 Mar 2000) |
| membranous urethra | The portion of the male urethra, about 1 cm in length, extending from the prostate to the beginning of the urethra in the corpus spongiosum just beyond the bulb. Synonym: pars membranacea urethrae masculinae, membranous urethra. (05 Mar 2000) |
| mucosa of female urethra | The inner mucosal layer of the female urethra. Synonym: tunica mucosa urethrae femininae. (05 Mar 2000) |
| muscular coat of female urethra | Muscular layer of the wall of the female urethra. Synonym: tunica muscularis urethrae femininae. (05 Mar 2000) |
| posterior urethra | The portion of urethra posterior to the urogenital diaphram (external sphincter). (05 Mar 2000) |
| prostatic urethra | The prostatic part of the male urethra, about 2.5 cm in length, that traverses the prostate; it includes the seminal colliculus, and the ejaculatory and prostatic ducts open into it. Synonym: pars prostatica urethrae. (05 Mar 2000) |
| sphincter muscle of urethra | Origin, ramus of pubis; insertion, with fellow in median raphe behind and in front of urethra; action, constricts membranous urethra; nerve supply, pudendal. Synonym: musculus sphincter urethrae, external urethral sphincter, Guthrie's muscle, musculus compressor urethrae, musculus constrictor urethrae, musculus sphincter urethrae membranaceae, sphincter muscle of urethra, Wilson's muscle. (05 Mar 2000) |
| spongy part of the male urethra | The portion of the male urethra, about 15 cm in length, which traverses the corpus spongiosum. Synonym: pars spongiosa urethrae masculinae, pars cavernosa, penile urethra, spongy part of the male urethra. (05 Mar 2000) |