| plexus venosus foraminis ovalis | A venous network around the mandibular nerve connecting the cavernous sinus and the pterygoid plexus. Synonym: plexus venosus foraminis ovalis, rete foraminis ovalis. (05 Mar 2000) |
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| plexus venosus prostaticus | A venous plexus, arising chiefly from the dorsal vein of the penis, situated below the base of the bladder at the sides of the prostate. See: prostaticovesical plexus. Synonym: plexus venosus prostaticus, plexus pudendalis, Santorini's labyrinth. (05 Mar 2000) |
| plexus venosus rectalis | A venous plexus resting upon the posterior and lateral walls of the rectum; it drains into the superior rectal vein to the portal, the middle rectal to the internal iliac and the inferior rectal to the internal pudendal. Synonym: plexus venosus rectalis, haemorrhoidal plexus. (05 Mar 2000) |
| plexus venosus sacralis | A venous plexus on the pelvic surface of the sacrum, formed by tributaries to the lateral sacral veins. Synonym: plexus venosus sacralis. (05 Mar 2000) |
| plexus venosus suboccipitalis | The extensive plexus of veins in the suboccipital region. Synonym: plexus venosus suboccipitalis. (05 Mar 2000) |
| plexus venosus uterinus | The plexiform veins that lie along the sides of the uterus in the broad ligament. Synonym: plexus venosus uterinus. (05 Mar 2000) |
| plexus venosus vaginalis | The plexus of veins that surrounds the vagina. Synonym: plexus venosus vaginalis. (05 Mar 2000) |
| plexus venosus vertebralis | Any of four interconnected venous networks surrounding the vertebral column; anterior external vertebral venous plexus, the small system around the vertebral bodies; posterior external vertebral venous plexus, the extensive system around the vertebral processes; anterior internal vertebral venous plexus, the system running the length of the vertebral canal anterior to the dura; posterior internal vertebral venous plexus, the system running the length of the vertebral canal posterior to the dura; the latter two constitute the epidural venous plexus. Synonym: plexus venosus vertebralis, Batson's plexus, vertebral venous plexus. (05 Mar 2000) |
| plexus venosus vesicalis | A plexus of veins around the fundus and sides of the bladder. Synonym: plexus venosus vesicalis, venous plexus of bladder. (05 Mar 2000) |
| pulsus venosus | A pulsation occurring in the veins, especially the internal jugular vein. Synonym: pulsus venosus. (05 Mar 2000) |
| nevus venosus | A nevus formed of a patch of dilated venules. (05 Mar 2000) |
| ductus venosus | In the foetus, continuation of the left umbilical vein through the liver to the vena cava inferior; after birth, its lumen becomes obliterated, forming the ligamentum venosum. Ductus venosus arantii, rarely used term for ductus venosus. (05 Mar 2000) |
| fossa of ductus venosus | A wide groove located posteriorly on the undersurface of the foetal liver between the caudate and left lobes; it lodges the ductus venosus and becomes the fissure of the ligamentum venosum in the adult. Synonym: fossa ductus venosi. (05 Mar 2000) |
| abnormal cleavage of cardiac valve | Congenital malformation of a valve leaflet with a defect extending from the free margin. (05 Mar 2000) |
| Amussat's valve | A series of crescentic folds of mucous membrane in the upper part of the cystic duct, arranged in a somewhat spiral manner. Synonym: plica spiralis ductus cystici, Amussat's valve, Heister's valve, spiral valve of cystic duct, valvula spiralis. (05 Mar 2000) |