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Although arteriovenous malformations (AVMs) have been known to have direct communications between arteries and veins without interposing capillaries, the exact location of arterial and venous junctions have not been defined. ... The Medscape Journal ... Allergy & Clinical Immunology...
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www.medscape.com/medline/abstract/10491812
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Capillaries are the smallest blood vessels in the body. Their structure consists of just a single layer of endothelial cells. Water and other small-molecule substances can pass through this wall. Capillaries act as a link between arteries and veins.
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www.burgerman.info/www-nursing/arteries-veins-capilliar...
www.burgerman.info/www-nursing/arteries-veins-capilliaries.htm
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Information and resources pertaining to the circulatory system. ... There are three types of vessels - arteries, veins, and capillaries. Arteries, veins, and capillaries are not anatomically the same. They are not just tubes through which the blood flows. Both arteries and veins have layers of smooth muscle surrounding them.
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biology.about.com/library/organs/blcircsystem6.htm
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Red blood cells squeeze through capillaries single file. Unlike arteries and veins, capillaries do not have specific names, but are named collectively for the region that they supply. Capillaries in the lungs, for example, are called pulmonary capillaries, and those in the stomach are the gastric capillaries.
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www.biologyreference.com/Bl-Ce/Blood-Vessels.html
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There are three varieties of blood vessels: arteries, veins, and capillaries. During blood circulation, the arteries carry blood away from the heart. The capillaries connect the arteries to veins. Finally, the veins carry the blood back to the heart.
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www.fi.edu/learn/heart/vessels/vessels.html
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Unlike the arteries and veins, capillaries are very thin and fragile. The capillaries are actually only one epithelial cell thick. They are so thin that blood cells can only pass through them in single file. The exchange of oxygen and carbon dioxide takes place through the thin capillary wall.
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www.fi.edu/learn/heart/vessels/capillaries.html
www.fi.edu/learn/heart/vessels/capillaries.html
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The tunica adventitia is the strong outer covering of arteries and veins. It is composed of ... Veins and Venules; The veins and venules are responsible for the transportation of most of the deoxygenated blood (except the pulmonary vein) to the heart. Venules are tiny vessels that link the capillaries to the veins,
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library.thinkquest.org/C0115080/?c=vessels
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The circulatory system is composed of the heart and blood vessels, including arteries, veins, and capillaries. ... The arteries, capillaries, and veins of the systemic circulatory system are the channels through which this long journey takes place. Once in the arteries, blood flows to smaller arterioles and then...
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kidshealth.org/teen/your_body/body_basics/heart.html
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There are three types of blood vessels: arteries, veins, and capillaries. These blood vessels have the ability to expand to allow more blood to flow through them. They can also contract to help control the flow of blood.
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web.buddyproject.org/web019/web019/bvessels.html
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