Venous Blood

Venous blood is deoxygenated blood in the circulatory system. It runs in the systemic veins from the organs to the heart. Deoxygenated blood is then pumped by the heart to lungs via the pulmonary arteries, one of the few arteries in the body that carries deoxygenated blood (the pulmonary veins likewise return the newly oxygenated blood to the heart).

Venous blood is typically warmer than arterial blood, and has a lower oxygen content and pH. It also has lower concentrations of glucose and other nutrients, and has higher concentrations of urea and other waste products. The difference in the oxygen content of the blood between the arterial blood and the venous blood is known as the arteriovenous oxygen difference.

Most medical laboratory tests are conducted on venous blood, with the exception of arterial blood gas tests. It is obtained for lab work by venipuncture (also called phlebotomy), or by fingerprick for small quantities.

Read more about Venous BloodColor, Usage

Other articles related to "blood, venous blood, venous":

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... is consumed is a function of the rate of blood flows and the rate of oxygen picked up by the red blood cells ... measurement of the oxygen concentration of the venous blood and the arterial blood ... the subject re-breathing air) and a CO2 absorber the oxygen content of blood taken from the pulmonary artery (representing mixed venous blood) the oxygen content of blood from ...
Magnetic Resonance Angiography - Acquisition - Research
... exploit differences in T1, T2 and chemical shift to distinguish blood from static tissue ... Fresh blood imaging (FBI) An imaging technique using fast or super fast spin echo sequences (FSE/SFSE) ... Takes advantage of the longer T2 relaxation of blood compared to surrounding tissue ...
Venous Blood - Usage
... Venous blood is used during stem cell donation. ...
Fick Principle - Underlying Principles
... by the peripheral tissues is equal to the product of the blood flow to the peripheral tissues and the arterial-venous concentration difference (gradient) of the substance ... determination of cardiac output, the substance most commonly measured is the oxygen content of blood thus giving the arteriovenous oxygen difference, and the flow calculated is the flow across ... is no intracardiac shunt, the pulmonary blood flow equals the systemic blood flow ...
Susceptibility Weighted Imaging
... combined to produce an enhanced contrast magnitude image which is exquisitely sensitive to venous blood, hemorrhage and iron storage ... The imaging of venous blood with SWI is a blood-oxygen-level dependent (BOLD) technique which is why it was (and is sometimes still) referred to as BOLD venography ... Due to its sensitivity to venous blood SWI is commonly used in traumatic brain injuries (TBI) and for high resolution brain venographies but has many other clinical applications ...

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