Bock, Walter J. Department of Biological Sciences, Columbia University, New York, New York.
Last reviewed:October 2017
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Any of the tubular channels for blood transport, of which there are three principal types: arteries, capillaries, and veins. Blood circulates through the body via blood vessels, which include the arteries, veins, and capillaries. These structures (see illustration) carry blood to and from the body's tissues and organs. The cardiovascular system, which consists of the heart and blood vessels, maintains a constant flow of blood throughout the body. See also: Angiogenesis; Blood; Cardiovascular system; Circulation; Heart (vertebrate)
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