Deoxygenated blood is blood that has circulated throughout tissues, is not devoid of oxygen, but contains diminished oxygen. 去氧血是已经环流过组织的血液，不是不含氧而是含氧量减少的血液。
The superior vena cava returns deoxygenated blood from the upper body to the right atrium, and it enters the upper portion of this chamber. 上腔静脉把来自上半身的去氧血返回右心房，因为它开口于右心房的上部。
