Cellular respiration is the process by which chemical energy stored in sugars is converted to energy molecules that fuel life's essential processes.

细胞呼吸是将储存在糖中的化学能转化为为生命的基本过程提供燃料的能量分子的过程。

This process of using oxygen to break down sugars into chemical energy is called cellular respiration.

线粒体利用氧气把糖分分解成化学能的过程叫做细胞呼吸。

And we can't forget mitochondria, the kidney-bean-shaped sites of cellular respiration in both plant and animal cells.

我们也不能忘记线粒体，这是植物和动物细胞中肾豆状的细胞呼吸部位。

Next time, we'll be seeing these plants in action as they accomplish some of their most important processes: cellular respiration and photosynthesis.

下节课，我们将看到这些植物完成一些最重要的过程：细胞呼吸和光合作用。

Most of us may think of Vitamin C as Citric acid, which is generated during cellular respiration of mammals including humans, but actually, it is not.

我们大多数人可能认为维生素 C 是柠檬酸，它是包括人类在内的哺乳动物细胞呼吸过程中产生的，但实际上并非如此。

It's only by working together and using both the bulk flow and simple diffusion of oxygen that they can make possible the process of cellular respiration.

只有通过协同工作，同时利用容积运动和氧气的简单扩散，它们才能使细胞呼吸的过程成为可能。

A process called cellular respiration consumes glucose and oxygen to form ATP, the energy currency of the cell.

称为细胞呼吸的过程消耗葡萄糖和氧气以形成 ATP，即细胞的能量货币。

Meanwhile other carbohydrates, the ones that are used to produce energy, go through a process called cellular respiration.

与此同时，其他碳水化合物， 即用于产生能量的碳水化合物，会经历一个称为细胞呼吸的过程。

When we breathe in, our blood takes oxygen out of the air through our lungs and carries it to our cells where it's used in the process of cellular respiration.

当我们吸气时，我们的血液通过肺部从空气中吸收氧气，并将其输送到我们的细胞中，在那里用于细胞呼吸过程。

In other words, oxygen is needed for cellular respiration and carbon dioxide is produced as a result.

换言之，细胞呼吸需要氧气，因此产生二氧化碳。

Oxygen does play a crucial role in one of the last steps of cellular respiration, but luckily our bodies have alternative pathways that help us survive when we temporarily lack oxygen.

氧气确实在细胞呼吸的最后一个步骤中起着重要的作用，但幸运的是我们的身体内存在着交替途径，可以帮助我们在临时缺氧的情况下活下来。

Ultimately, this is how nutrients, like O2 get pushed out to the organs and tissues that need it; and how wastes, like CO2, or carbon dioxide, which is the main by-product of cellular respiration, gets removed.

在此系统中，营养物质（如氧气）被送到所需的器官和组织中；同时，身体产生的废物（如二氧化碳，细胞呼吸的主要副产品）被移出体外。

And when you inhale, your red blood cells grab the O2 from your lungs, and pass it off to your other cells, which use it for cellular respiration -- the process of breaking down sugar to create chemical energy.

当您吸气时，您的红细胞会从您的肺部获取氧气， 并将其传递给您的其他细胞，这些细胞将其用于细胞呼吸——分解糖分以产生化学能的过程。