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

CT扫描或MRI有助于诊断腹水、肝硬、脾肿大，或病变（如下脉扩张）。

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

液从门脉流向脉的通道阻塞时，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，所有的液都回流至上脉和下脉，最终达右心房。

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

小脉汇聚形成越来越大的脉，这些脉最终排入脉。

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

脉将脱氧注入心脏的右心房。

The venae cavae has two divisions.

脉有两个分支。

So far, we've learned that blood returning to the heart from head to toe drains into the superior and inferior vena cava.

到目前为止，我们已经了解到，液从头到脚流回心脏，流入上下脉。

This circuit is concerned with supplying food and oxygen to all the tissues of the body and carrying away waste materials from the tissues for disposal.

来自于肺和其它组织的液经（上下）脉回流至心脏。脉将液运至右心房。

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.

因为脉是最大的脉，我们可以将脉看作是最大的脉来回忆这个术语。

They drain your body tissues, and then merge to make larger and larger veins and finally converge to form the largest veins in the body, called the venae cavae.

它们排出身体组织，然后汇合形成越来越大的脉，最后汇合形成体内最大的脉，称为脉。

So, the bigger the gap is between the high pressure in your ventricles and aorta, and the low pressure in your vena cava and atria, the faster a liter of blood will flow through your system.

所以，心室和主动脉的高压和脉和心房的低压之间的差距越大，一升液流过你系统的速度就越快。

As the inferior vena cava passes through both abdominal and thoracic cavities, an increase in abdominal pressure together with a decrease in thoracic pressure squeeze the blood upward- toward the heart.

下脉同时通过腹和胸时，腹压力增加和胸压力降低会将液向上挤压—流向心脏。

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.

下脉比上脉长得多，可以说它有更大的作用，因为它从横膈膜下的所有身体区域将液回流到心脏。