Definitions for vena comitans
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accompanying vein, vena comitans(noun)
a vein accompanying another structure; a vein may accompany an artery in such a way that the arterial pulses aid venous return
Vena comitans is Latin for accompanying vein. It refers to a vein that is usually paired, with both veins lying on the sides of an artery. They are found in close proximity to arteries so that the pulsations of the artery aid venous return. Because they are generally found in pairs, they are often referred to by their plural form: venae comitantes. Venae comitantes are usually found with certain smaller arteries, especially those in the extremities. Larger arteries, on the other hand, generally do not have venae comitantes. They usually have a single, similarly sized vein which is not as intimately associated with the artery. Examples of arteries and their venae comitantes: ⁕Radial artery and radial veins ⁕Ulnar artery and ulnar veins ⁕Brachial artery and brachial veins Examples of arteries that do NOT have venae comitantes: ⁕Axillary artery and the axillary vein ⁕Subclavian artery and the subclavian vein
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"vena comitans." Definitions.net. STANDS4 LLC, 2016. Web. 12 Feb. 2016. <http://www.definitions.net/definition/vena comitans>.