The partial pressure gradient of each gas equilibrates as blood flows through the pulmonary capillaries.

当血液流过肺毛细血管时，每种气体的分压梯度趋于平衡。

Let's take a look at this, taking into account partial pressure gradients.

我们看一下，分压梯度。

Just like in the lungs, partial pressure gradients drive gas exchange in the tissues.

就像在肺中一样，分压梯度会驱动组织中的气体交换。

We talked about partial pressure gradients, and how they, along with changes in blood temperature, acidity, and CO2 concentrations, change how hemoglobin binds to gases in your blood.

我们讨论了分压梯度，以及它们如何随着血液温度、酸度和二氧化碳浓度的变化，改变血红蛋白与血液中气体的结合方式。

So basically there is no partial pressure gradient, which makes it really hard to get oxygen into your blood. But, let's get back to the red blood cells.

所以基本上没有分压梯度，这使得氧气很难进入血液。但是，让我们说回到红细胞。

So the hemoglobin drops its carbon dioxide, which moves down its partial pressure gradient into the air of your lungs, so you can exhale it, and the whole thing can start all over again.

所以血红蛋白会下降它的二氧化碳，二氧化碳会沿着它的分压梯度移动到你肺部的空气中，所以你可以呼出它，整个事情可以重新开始。

This big differences in pressure make it easy for oxygen molecules to travel from the outside air into your blood plasma, because, as a rule dissolved gases always diffuse down their partial pressure gradients.

这种巨大的压力差异使得氧分子很容易从外部空气进入血浆，因为，作为一项规则，溶解气体总是沿着它们的分压梯度扩散。

It's important to note that gas exchange is directly proportional to the partial pressure gradient across the respiratory membrane, as partial pressure takes into account both concentration and pressure.

需要注意的是，气体交换与呼吸膜的分压梯度成正比，因为分压同时考虑浓度和压力。