| Ruysch's veins | Portacaval anastomoses formed from vein's in the walls of retroperitoneal viscera, such as the ascending and descending colon, passing to the tributaries of the inferior vena cava in the posterior body wall instead of those of the portal vein. Synonym: Ruysch's veins. (05 Mar 2000) |
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| middle rectal veins | Several veins that pass from the rectal venous plexus (in which they anastomose with the superior rectal veins) to the internal iliac vein, which ultimately drains into the inferior vena cava. Since the superior rectal veins ultimately drain into the portal vein, the middle retal veins participate in a portocaval anastomosis, and the rectal venous plexus is subject to varicosities during portal hypertension. Synonym: venae rectales mediae. (05 Mar 2000) |
| circumflex veins | See: deep circumflex iliac vein, superficial circumflex iliac vein, lateral circumflex femoral veins, medial circumflex femoral veins. (05 Mar 2000) |
| phrenic veins | See: inferior phrenic vein, superior phrenic veins. (05 Mar 2000) |
| Cockett communicating perforating veins | Mid-thigh perforation veins that connect the deep and superficial venous systems. (05 Mar 2000) |
| plantar digital veins | Drain the plantar and distal dorsal aspects (nail beds) of the toes and pass back to form four metatarsal veins that in turn empty into the plantar venous arch. Synonym: venae digitales plantares. (05 Mar 2000) |
| plantar metatarsal veins | Veins receiving the plantar digital veins and draining in turn into the deep plantar venous arch, which empties into the medial and lateral plantar veins. Synonym: venae metatarseae plantares. (05 Mar 2000) |
| conjunctival veins | The veins of the conjunctiva which drain primarily to the ophthalmic veins. Synonym: venae conjunctivales. (05 Mar 2000) |
| musculophrenic veins | The veins that accompany the musculophrenic artery and drain blood from the upper abdominal wall, and anterior portions of the lower intercostal spaces and the diaphragm. Synonym: venae musculophrenicae. (05 Mar 2000) |
| pontine veins | Several veins running transversely on the pons to join the petrosal vein. Synonym: venae pontis, veins of pons. (05 Mar 2000) |
| posterior cardinal veins | From the caudal part; the common cardinal veins, formed by the anastomosis of the anterior and posterior cardinal vein's, are the main systemic return channels to the heart; in the older literature, sometimes called Cuvier's ducts. (05 Mar 2000) |
| posterior intercostal veins | Veins draining the intercostal spaces posteriorly; those of the first 1-C space drain into the brachiocephalic veins; from spaces 2-3 they drain into right and left superior intercostal veins; from the fourth to the eleventh spaces on the right they are tributaries of the azygos vein; on the left they empty into either the hemiazygos or accessory hemiazygos veins. Synonym: venae intercostales posteriores. (05 Mar 2000) |
| posterior labial veins | They pass posteriorly from the labia majora and minora to the internal pudendal veins. Synonym: venae labiales posteriores. (05 Mar 2000) |
| posterior parotid veins | Branches draining part of the parotid gland and emptying into the retromandibular vein. Synonym: venae parotidea, posterior parotid veins. (05 Mar 2000) |
| posterior scrotal veins | Veins from the posteriro aspect of the scrotum to the internal pudendal veins. Synonym: venae scrotales posteriores. (05 Mar 2000) |