from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun The system of structures in vertebrates consisting of the heart, blood vessels, and lymphatics, by which blood and lymph are circulated throughout the body.
- noun A similar system by which a fluid, such as hemolymph, is distributed in other animals.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physiology The parts of a animal
bodycomprising the heart, veins, capillariesand arteries.
- noun The parts of a
machineresponsible for the circulationof some fluid.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the organs and tissues involved in circulating blood and lymph through the body
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