vas aberrans


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vas

 [vas] (pl. va´sa) (L.)
vessel. adj., adj va´sal.
vas aber´rans
1. a blind tube sometimes connected with the epididymis; a vestigial mesonephric tube.
2. any anomalous or unusual vessel.
va´sa afferen´tia vessels that convey fluid to a structure or part.
va´sa bre´via short gastric arteries.
vas de´ferens ductus deferens.
va´sa efferen´tia vessels that convey fluid away from a structure or part.
va´sa lympha´tica lymphatic vessels.
va´sa prae´via the presentation, in front of the fetal head during labor, of the blood vessels of the umbilical cord where they enter the placenta.
va´sa rec´ta re´nis long U-shaped vessels arising from the efferent glomerular arterioles of juxtamedullary nephrons and supplying the renal medulla. Called also arteriolae rectae renis.
va´sa vaso´rum the small nutrient arteries and veins in the walls of the larger blood vessels.

vas aberrans

(1) Aberrant ductule; ductulus aberrans [NA6]. 
(2) (Superior aberrant ductule); (ductulus aberrans superior) [NA6].
(3) A nonspecific term applicable to any vessel with an anomalous course.

vas aberrans

1. A narrow tube varying in length from 112 to 14 in (3.8 to 35.6 cm), occasionally found connected with the lower part of the canal of the epididymis or with the commencement of the vas deferens.
2. A vestige of the bile ducts sometimes found in the liver.
See also: vas

vas

pl. vasa [L.] a vessel.

vas aberrans
1. a blind tube sometimes connected with the epididymis; a vestigial mesonephric tube.
2. any anomalous or unusual vessel.
vas afferentia
vessels that convey fluid to a structure or part.
vas brevia
short vessels such as the gastric arteries.
vas deferens
the excretory duct of the testis which conveys spermatozoa from the tail of the epididymis to the pelvic urethra and which sometimes unites with the excretory duct of the seminal vesicle to form the ejaculatory duct; called also ductus deferens.
vas efferentia
vessels that convey fluid away from a structure or part.
vas lymphatica
lymphatic vessels.
vas recta
straight vessels, such as the long U-shaped vessels arising from the efferent glomerular arterioles of juxtamedullary nephrons and supplying the renal medulla.
vas vasorum
the small nutrient arteries and veins in the walls of the larger blood vessels.