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vas[vas] (pl. va´sa) (L.)
vessel. adj., adj va´sal.
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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
small arteries distributed to the outer and middle coats of the larger blood vessels, and their corresponding veins.
Synonym(s): vessels of vessels
Farlex Partner Medical Dictionary © Farlex 2012
va·sa va·so·rum(vā'să vā-sō'rŭm) [TA]
Small arteries distributed to the outer and middle coats of the larger blood or lymph vessels, and their corresponding veins.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012