Nitric oxide
Medical term · N
A compound produced by the endothelium (the lining of the interior walls of arteries) that helps widen blood vessels and counteract high blood pressure. Also called endothelium-derived relaxing factor.
Related terms
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Endothelium-derived relaxing factorChemicals in the body that cause blood vessels to expand or relax, lowering blood pressure. Often referred to as EDRF.
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High blood pressureWhen blood flowing through arteries pushes on artery walls with abnormally high force over a sustained period of time. Also called hypertension.
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Blood pressureThe force blood exerts against the walls of the arteries. Optimal blood pressure is less than 120/80 mm Hg.
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Blood vesselsHollow tubes that transport blood throughout the body; includes arteries, veins, and capillaries.