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Artery - Definition



Definition

The arteries are part of the principal blood vessels in the human body. They transport blood from the heart to the organs. The arteries are elasticated thanks to the muscle fibers that surround them. This elasticity enables the contraction, or vasoconstriction, and expansion, or vasodilation, and the tolerance of high pressure as blood is pumped by the cardiac ventricles. The pulmonary arteries serve the lungs, and the systemic arteries distribute the blood necessary to the survival of cells. The arteries contain all the oxygenated blood in the lungs and this oxygen is carried by the arterial network to the organs; only the pulmonary artery contains blood labeled "venous", meaning depleted of oxygen.

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