vas (redirected from Vasa praevia)

vas (vas) pl. va´ sa  [L.] vessel.va´sal

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vas aber´rans 

1. a blind tubule sometimes connected with the epididymis; a vestigial mesonephric tubule.

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 capilla´re  a capillary.

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  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  straight arterioles of kidney.

va´sa vaso´rum  the small nutrient arteries and veins in the walls of the larger blood vessels.

va´sa vortico´sa  vorticose veins.

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vas (vs)

n. pl. va·sa (vz)

An anatomical duct or canal conveying any liquid, such as blood, lymph, chyle, or semen.

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vas

[vas] pl. vasa

Etymology: L, vessel

any one of the many vessels of the body, especially those that convey blood, lymph, or spermatozoa.

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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.

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vas

pl. vasa [L.] a vessel.

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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.