WikiDoc Resources for Venule |
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Media |
Evidence Based Medicine |
Clinical Trials |
Ongoing Trials on Venule at Clinical Trials.gov Clinical Trials on Venule at Google
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Guidelines / Policies / Govt |
US National Guidelines Clearinghouse on Venule
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Books |
News |
Commentary |
Definitions |
Patient Resources / Community |
Directions to Hospitals Treating Venule Risk calculators and risk factors for Venule
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Healthcare Provider Resources |
Continuing Medical Education (CME) |
International |
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Business |
Experimental / Informatics |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
A venule is a small blood vessel that allows deoxygenated blood to return from the capillary beds to the larger blood vessels called veins.
Venule walls have three layers: An inner endothelium composed of squamous endothelial cells that act as a membrane, a middle layer of muscle and elastic tissue and an outer layer of fibrous connective tissue. The middle layer is poorly developed so that venules have thinner walls than arterioles. These vessels are pink sometimes due to the high content of nitrogen.