| L/3 | lower third |
|---|---|
| LAS | laboratory automation system; lateral amyotrophic sclerosis; laxative abuse syndrome; left anterior-... |
| LBNP | lower body negative pressure |
| LCCS | lower cervical cesarean section |
| LE | lactate extraction; left ear; left eye; leukocyte elastase; leukoerythrogenic; live embryo; Long Eva... |
| prefrontal veins | The superficial veins draining the prefrontal cerebral cortex and emptying into the superior sagittal sinus. Synonym: prefrontal veins. (05 Mar 2000) |
|---|---|
| sacral veins | See: lateral sacral veins, median sacral vein. (05 Mar 2000) |
| saphenous veins | See: accessory saphenous vein, great saphenous vein, small saphenous vein. (05 Mar 2000) |
| Sappey's veins | Several small veins arising from cutaneous veins about the umbilicus running along the round ligament of the liver, and terminating as accessory portal veins in the substance of this organ; they constitute a portocaval anastomosis and are subject to varicosity druign portal hypertension; varicose paraumbilical veins form the "caput medussae". Synonym: venae paraumbilicales, Sappey's veins. (05 Mar 2000) |
| hepatic veins | Veins which drain the liver. (12 Dec 1998) |
| scleral veins | Small veins draining the sclera; they are tributaries to the anterior ciliary veins. Synonym: venae sclerales. (05 Mar 2000) |
| sclerosing of varicose veins | A procedure which involves the injection of a sclerosing agent (causes scarring) into varicose veins in the extremities. Sclerotherapy may also be performed in the oesophagus, using UGI endoscopy, in the treatment of oesophageal varices in patients with cirrhosis of the liver. (27 Sep 1997) |
| scrotal veins | See: anterior scrotal veins, posterior scrotal veins. (05 Mar 2000) |
| pudendal veins | See: external pudendal veins, internal pudendal vein. (05 Mar 2000) |
| pulmonary veins | The veins that return the oxygenated blood from the lungs to the left atrium of the heart. (12 Dec 1998) |
| short gastric veins | Small vessels that drain the fundus and left portion of the stomach wall and empty into the splenic vein. Synonym: venae gastricae breves. (05 Mar 2000) |
| sigmoid veins | The several tributaries of the inferior mesenteric vein that drain the sigmoid colon. Synonym: venae sigmoideae. (05 Mar 2000) |
| smallest cardiac veins | Numerous small valveless venous channels that open directly into the chambers of the heart from the capillary bed in the cardiac wall, enabling a form of collateral circulation unique to the heart. Synonym: smallest cardiac veins, thebesian veins. (05 Mar 2000) |
| spinal veins | The veins that drain the spinal cord; they form a plexus on the surface of the cord from which veins pass along the spinal roots to the internal vertebral venous plexus. Synonym: venae spinales. (05 Mar 2000) |
| stellate veins | The star-shaped groups of venules in the renal cortex. Synonym: stellate veins, stellate venules, stellulae verheyenii, venae stellatae, Verheyen's stars. (05 Mar 2000) |