At the end of each branch is a tiny air sac called an alveolus.

在每个分支末端都有一个叫做泡小气囊。

Emphysema is when the tiny structures in your lungs called alveoli, break down.

气肿是指中被称为泡微小裂。

Initially, doctors had no way to alter the stretchability or squeeziness of their patients' air sacs.

最初，医生没有办法改变病人泡拉伸性或挤压力度。

When this fluid builds up, it makes gas exchange inside the alveoli much more difficult.

当这些液体积聚起来后，就会使泡内空气转换更加困难。

That problem happens deep in the lungs, in tiny air sacs called alveoli, which exchange carbon dioxide for oxygen.

这个问题出现在部处，叫做泡微小气囊中，泡是将二氧化碳转化为氧气部位。

Free from particles, the inhaled air is now in the alveolus surrounded by mostly type I pneumocytes.

移出异物后，泡中空气周围围绕大多是I型泡细胞。

In atypical or interstitial pneumonia, the infection is mainly just outside the alveoli in the interstitium.

在非典型炎和间性炎中，感染主要发生在间泡外。

Now, the total surface area of alveoli is about 140 square meters or 1,500 square feet.

现在，泡总表面积约为140平方米或1500平方英尺。

Zooming out a bit and looking at the acinus, which is a bunch of alveoli, it just turns into one big cavity.

我们把镜头拉远点，看看腺泡，也就是一束泡集合体；这时腺泡会变成一个大囊腔。

And if there's one thing your body hates, it's a bunch of exotic material spicing up your sensitive alveoli!

如果有你身体讨厌东西进来话，就是一堆有毒东西让你泡激动起来了！

This blood absorbs oxygen from the inflated alveoli and leaves behind carbon dioxide.

这种血液从膨胀泡中吸收氧气并留下二氧化碳。

This large number of alveoli greatly increases the surface area for gas exchange.

大量泡大大增加了气体交换表面积。

The respiratory system takes in oxygen from the air and expels carbon dioxide and water vapor.

空气进入口和鼻，穿过喉咙和气管。气管发出左右分支分别进入两，之后以超过20次分支形成大量泡。

On the other side of the pneumocytes are endothelial cells that line the capillary walls, which is what holds the blood.

而泡细胞另一边就是毛细血管壁内皮细胞，毛细血管携带便是我们亲爱血液。

The respiratory membrane separates the alveolar air on one side from the blood on the other.

呼吸膜将一侧泡空气与另一侧血液分离。

Another helpful comparison for the arrangement of alveoli are clusters of grapes, where a single alveolus is like an individual grape.

另一个关于泡排列有用比喻是多串葡萄，每一个泡就像一个葡萄个体。

It then fills the alveoli, tiny air sacs that enable the exchange of oxygen and carbon dioxide between the lungs and blood.

然后填充泡，微小空气囊能使氧气和二氧化碳在部和血液之间交换。

The alveoli are tiny air sacs that look like tiny clumps of grapes, that are wrapped up in a net of capillaries.

泡是微小气囊，看起来像小丛葡萄，包裹于毛细血管网中。

The smallest of the bronchial branches are called bronchioles. At the end of the bronchioles are clusters of air sacs called alveoli.

最小支气管分支称为细支气管。在细支气管末端是称为泡气囊簇。

Alright … as a quick recap, pneumonia is an infection of the lungs that results in air sacs being filled with fluid.

好，快速回顾一下：炎是部一种导致泡充满液体感染。