And pneumonia, often triggered by bacterial or viral infections, attacks the alveoli themselves.

肺炎——常常由细菌或病毒引发——攻击肺本身。

Men have some breast tissue as well, but they lack milk secreting alveoli.

男性也有乳房组织，但他们没有分泌乳汁的腺。

This allows air to be drawn in, inflating the alveoli — millions of small sacs inside our lungs.

是空气被吸进来，充满肺——肺是我们肺部成千上万的小囊。

And with each breath in, oxygen enters the alveoli and freely diffuses into the blood.

而每次呼吸，氧气都进入肺，自由扩散进入血液。

The first part is the root, and it sits within the alveolus.

第一部分是牙根，位牙槽骨内。

Pneumonia is an infection of the alveoli that causes them to fill with fluid.

肺炎是一种肺，导致肺充满液体。

But some of these invaders may get past the mucociliary escalator into the lungs, where they meet the alveoli.

但是有些入侵者有可能粘膜纤毛自动扶梯并进入到肺里，并接触到肺。

In healthy babies, the alveoli are like perfectly inflated mini-balloons.

在健康的宝宝体内，肺就像一个个充满了气的微型气球一样。

Now, multiply what you see by hundreds of millions, as each of our lungs contain over 100 million alveoli.

现在，把你看到的乘以几亿，因为我们每个肺都有超1亿个肺。

These outpouchings are called alveoli, and there are about 500 million of them within the lungs.

这些突起称为肺，在肺部大约有5亿个肺。

The immune system releases additional white blood cells in the alveoli to help.

免疫系统也在肺中释放出更多的白血细胞去帮忙。

The lower respiratory system begins with the larynx, or the voice box, and ends with the alveoli.

下呼吸系统开始喉部，或称为喉头，结束肺。

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

另一个关肺排列的有用比喻是多串葡萄，每一个肺就像一个葡萄个体。

They represent tiny air-sacs or alveoli getting filled with fluid, and turning a shade of grey on CT scans.

这代表着肺中充满了液体，从而在CT显像中呈现灰色阴影。

When the lungs are affected, the toxins damage the alveolar-capillary membranes, which can result in bleeding within the alveoli.

肺部受累时，细菌毒素破坏肺毛细血管内膜，从而导致肺内出血。

If enough fluid fills some of these capillaries in the lungs, they can rupture, leaking blood into the alveoli.

一旦足量积液充斥着肺部毛细血管，可能出现破溃，血液渗出进入肺。

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

移出异物后，肺中的空气周围围绕的大多是I型肺细胞。

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

这个问题出现在肺部深处，叫做肺的微小气囊中，肺是将二氧化碳转化为氧气的部位。

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，就使肺内的空气转换更加困难。

The respiratory zone includes the respiratory bronchioles and the alveoli.

呼吸区包括呼吸性细支气管和肺。