And this explains why arteries and veins have different structures.

这就解释了为什么动和有不同的结构。

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

感觉是心动过速，有扩张的迹象。

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官一样，粗糙而粘稠，有各种奇怪的、瓣膜和心室。

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.

有更大的引流面积，其作用是将脱氧血从横膈膜的所有身体区域回流到心脏。

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.

所以如你所见这是一个典型的飞行羽毛，有一个封闭的和一个偏移的羽轴给它一个符合空气动力学的翼型形状，鸵鸟已经完全失去了这种羽毛了。