Medical Dictionary

vein

noun \ˈvān\

Medical Definition of VEIN

:  any of the tubular branching vessels that carry blood from the capillaries toward the heart and have thinner walls than the arteries and often valves at intervals to prevent reflux of the blood which flows in a steady stream and is in most cases dark-colored due to the presence of reduced hemoglobin

Illustration of VEIN

May 28, 2015
fictioneer Hear it
someone who writes fiction
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