And this explains why arteries and veins have different structures.

就解释了为什么动脉和静脉有不同的结构。

So where you see a typical flight feather that has a closed vein and an offset rachis to give it an aerodynamic airfoil shape, the ostrich is have done away with that completely.

所以如你所一个典型的飞行羽毛，有一个封闭的静脉和一个偏移的羽轴给它一个符合空气动力学的翼型状，鸵鸟已经完全失去了种羽毛了。

The actual heart looks like, well any other organ, gross and slimy with all kinds of weird veins, valves and ventricles.

真正的心脏看起来就像其他器官一样，粗糙，有各种奇怪的静脉、瓣膜和心室。

Feels tachycardic. I'm seeing some J.V.D.

感觉心动过速，有颈静脉扩张的迹象。

The only thing that helped was intravenous steroids, which is not an ideal thing for a small child.

唯一有帮助的静脉注射类固醇，但对于一个小孩子来说并不理想的治疗方法。

The inferior vena cava has a bigger area to drain, and its job is to return deoxygenated blood to the heart from all body regions below the diaphragm.

下腔静脉有更大的引流面积，其作用将脱氧血从横膈膜下的所有身体区域回流到心脏。