Even partial compression of the superior vena cava can cause the venous pressure behind the obstruction to increase.

局部压迫上甚至能造成阻断后方的压升高。

On the right side, the superior vena cava, ascending aorta, right ventricle, left ventricle, and inferior vena cava should all be visible.

在心脏右侧，分别是上、升主、右心室、左心室和下。

Lastly, G is for great vessels which includes the superior vena cava, inferior vena cava, ascending aorta, aortic arch, pulmonary artery, and descending aorta.

最后，G指" Great vessels" ，包括了上、下、升主、主弓、肺与降主。

The superior vena cava is found in the upper chest.

上位于上胸部。

The superior vena cava resembles a drain that leads down into the heart.

上像通向心脏的引流。

A Pancoast tumor in the right lung apex can also compress a large vein called the superior vena cava which drains blood from the head, upper chest, and arms.

右侧的肺上沟瘤还会压迫上；上汇集头部、上胸部和上肢的液。

Blood from the upper body returns via the superior vena cava, blood from the lower body returns via the inferior vena cava.

上半身液通过上回流，下半身液通过下回流。

Now, the lower half of the body drains into the inferior vena cava and the upper half drains into the superior vena cava both of which dump blood back into the right atrium.

然后，下半身的液流入下，上半身的液则流入上，由这两者将液送回右心房。

The job of the superior vena cava is simple, and like many other major veins in the body, it is nothing more than a transportation tube.

上的作用很简单，和体内其他许多主要一样，它不过是一个运输。

This is a good way to think about the superior vena cava, because its job is to drain (or return) deoxygenated blood straight down into the right atrium.

这是考虑上的好方法，因为它的工作是将脱氧的液直接排入（或回流）到右心房中。

The venae cavae has two divisions: the superior vena cava and the inferior vena cava, and these divisions both return blood to the right atrium of the heart.

上和下，这些分支都将液回流到心脏的右心房。

Blood returning from tissues other than the lungs enters the heart by way of the venae cavae; the superior vena cava and the inferior vena cava. The venae cavae empty into the right atrium.

当心房收缩时，右房内液经三尖瓣进入右室。

Therefore, if we take into consideration the superior vena cava's appearance and name, we can easily define it as the large vein that returns deoxygenated blood to the heart from the head and arms.

因此，如果我们考虑上的外观和名称，我们很容易将其定义为从头部和手臂将脱氧返回心脏的。

The inferior vena cava is much longer than the superior vena cava, and you could argue that it has a bigger job, because it returns blood to the heart from all body regions below the diaphragm.

下比上长得多，可以说它有更的作用，因为它从横膈膜下的所有身体区域将液回流到心脏。