| lacuna urethralis | One of a number of little recesses in the mucous membrane of the spongy urethra into which empty the ducts of the urethral glands. Synonym: lacuna urethralis, Morgagni's lacuna. (05 Mar 2000) |
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| annulus urethralis | The complete collar of smooth muscle cells of the neck of the urinary bladder which extend distally to surround the preprostatic sportion of the male urethra. There is not a comparable structure in the neck of the femoral bladder; the internal urethral sphincter may exist to prevent reflux of semen into bladder. Synonym: annulus urethralis, internal urethral sphincter, musculus sphincter vesicae, preprostate urethral sphincter, proximal urethral sphincter, sphincter muscle of urinary bladder. (05 Mar 2000) |
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| arteria urethralis | <anatomy, artery> Origin, perineal artery; distribution, membranous urethra. Synonym: arteria urethralis. (05 Mar 2000) |
| carina urethralis vaginae | The lower part of the anterior column of the vagina, in relation with the urethra. Synonym: carina urethralis vaginae, carina vaginae. (05 Mar 2000) |
| colliculus urethralis | An elevated portion of the urethral crest upon which open the two ejaculatory ducts and the prostatic utricle. Synonym: colliculus seminalis, caput gallinaginis, colliculus urethralis, seminal hillock, verumontanum. (05 Mar 2000) |
| crista urethralis | Longitudinal mucosal fold in the dorsal wall of the urethra. See: urethral crest of female, urethral crest of male. Synonym: crista urethralis. (05 Mar 2000) |
| crista urethralis femininae | A conspicuous longitudinal fold of mucosa on the posterior wall of the urethra. Synonym: crista urethralis femininae. (05 Mar 2000) |
| crista urethralis masculinae | A longitudinal fold on the posterior wall of the urethra extending from the uvula of the bladder through the prostatic urethra; prominent in its midportion is the seminal colliculus. Synonym: crista phallica, crista urethralis masculinae. (05 Mar 2000) |
| habenula urethralis | One of two fine, whitish lines running from the meatus urethrae to the clitoris in girls and young women; the vestiges of the anterior part of the corpus spongiosum. (05 Mar 2000) |
| facies urethralis penis | The surface of the penis opposite to the dorsum penis. Synonym: facies urethralis penis. (05 Mar 2000) |
| vascular lacuna | <anatomy> The medial compartment beneath the inguinal ligament, for the passage to the femoral vessels; it is separated from the muscular lacuna by the iliopectineal arch. Synonym: lacuna vasorum. (05 Mar 2000) |
| cartilage lacuna | A cavity within the matrix of cartilage, occupied by a chondrocyte. Synonym: cartilage space. (05 Mar 2000) |
| cerebral lacuna | A small circumscribed loss of brain tissue caused by occlusion of one of the small penetrating arteries. Synonym: lacuna cerebri. (05 Mar 2000) |
| Morgagni's lacuna | One of a number of little recesses in the mucous membrane of the spongy urethra into which empty the ducts of the urethral glands. Synonym: lacuna urethralis, Morgagni's lacuna. (05 Mar 2000) |
| muscular lacuna | The lateral compartment beneath the inguinal (Poupart's) ligament, for the passage of the iliopsoas muscle and femoral nerve; it is separated by the iliopectineal arch from the vascular lacuna. Synonym: lacuna musculorum. (05 Mar 2000) |
| intervillous lacuna | One of the blood spaces in the placenta into which the chorionic villi project. (05 Mar 2000) |