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In the circulatory system, venous blood is blood returning to the heart. With one exception (the pulmonary vein) this blood is de oxygenated and high in carbon dioxide, having released oxygen and absorbed C O₂ in the tissues.

Venous blood can be obtained by venesection or phlebotomy, or in small quantities by fingerprick. Most medical laboratory tests are conducted on venous blood, with the exception of arterial blood gasses.

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Topics: Venous Blood, Venous Thrombosis...

Venous thrombosisA venous thrombosis is a blood clot that forms within a vein. Thrombosis is a specific medical term for a blood clot that remains in the place where it formed. Superficial venous thromboses can cause discomfort but generally do not cause serious consequen

Venous bloodIn the circulatory system, venous blood is blood returning to the heart. With one exception (the pulmonary vein) this blood is de oxygenated and high in carbon dioxide, having released oxygen and absorbed C O in the tissues. Venous blood can be obtained b

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