Both vena cavas [sic] are veins, which bring blood towards the heart.

上、静脉均为静脉，运送血液回流到心脏。

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

局部压迫上静脉甚至能造成阻后方的静脉压升高。

Also, a filter can be surgically placed in the inferior vena cava to prevent pulmonary embolisms.

也可以放静脉滤器来防止肺栓塞的发生。

But in some situations, an obstruction may prevent blood flow from the portal vein towards the inferior vena cava.

但有时从门静脉流到静脉的血流会受阻。

Got it. Wait, I-I think I can localize the bleeding. I think it's coming from the inferior vena cava.

搞定。等等，我想我可以把血止住了。我想它是从静脉出来的。

CT scan or MRI help diagnose ascites, cirrhosis, splenomegally or vascular alterations like inferior vena cava dilatation.

CT扫描或MRI有助于诊、肝硬化、脾肿大，或血管病变（如静脉扩张）。

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，分别是上静脉、升主动脉、右心室、左心室和静脉。

This happens when there's an obstruction in the passage of blood from the portal vein towards the vena cava.

当血液从门静脉流向静脉的通道阻塞时，就会发生这种情况。

Ultimately, all of the blood ends up in the superior or inferior vena cava and dumps into the right atrium.

最终，所有的血液都回流至上静脉和静脉，最终抵达右心房。

The word 'venae' is Latin for 'vein, ' and the word 'cavae' is Latin for 'hollow cavity'.

'venae'一词是拉丁语，意为静脉，'cavae' 是拉丁语，意为空。

The superior vena cava is found in the upper chest.

上静脉位于上胸部。

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指大血管" Great vessels" ，包括了上静脉、静脉、升主动脉、主动脉弓、肺动脉与降主动脉。

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

上半身血液通过上静脉回流，半身血液通过静脉回流。

Once the liver processes all these substances, it sends the blood to the heart through the inferior vena cava to enter the systemic venous system.

一旦肝脏处理了所有这些物质，肝脏将血液通过静脉进入体静脉系统送往心脏。

The venae cavae empties the deoxygenated blood into the right atrium of the heart.

静脉将脱氧血注入心脏的右心房。

Small veins converge to form larger and larger veins, which eventually drain into the venae cavae.

小静脉汇聚形成越来越大的静脉，这些静脉最终排入静脉。

The venae cavae has two divisions.

静脉有两个分支。

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

上静脉像通向心脏的引流管。

So, if you think about it, the blood that drains into the inferior vena cava has to move upward, against gravity.

所以，如果你仔细想想，流入静脉的血液必须向上流动，对抗重力。

Because the venae cavae is your largest vein, you can recall this term by thinking of the venae cavae as the vein with the biggest cavity.

因为静脉是最大的静脉，我们可以将静脉看作是最大的静脉来回忆这个术语。