评论
打印
And so, if this is my lung, on this side, this is my left lung.
假设这是左肺
And this is my right lung, on this side.
这是右肺
Then these vessels--
那么这些血管-
and I'll let you try to guess what they would be called--these vessels.
大家可以猜一下这些血管叫什么，看这些血管
This would be my--
大家看
I want to make sure I get my right and left straight.
我要标清楚左右
This is my left pulmonary artery.
这是左肺动脉
And I hesitated there just to make sure you got that
我空一下，是为了让大家想到
because it's taking blood away from the heart.
这是离开心脏的血液
And this is my right pulmonary artery.
这是右肺动脉
So this is my right and left pulmonary artery.
这分别是右肺动脉和左肺动脉
And so blood goes, now, into my lungs.
现在血液进入肺部
These are the lungs that are kind of nestled into my thorax, where my heart is sitting.
肺和心脏都在胸腔中
It goes into my lungs. And remember, this blood is blue.
血液进入肺中-注意，血液用蓝色标
Why is it blue?
为什么用蓝色呢？
Well, it's blue because it doesn't have very much oxygen.
蓝色表示含氧量低
And so one thing that I need to pick up is oxygen.
那么在肺中，要补充的首先是氧气
And so that's one thing that the lungs are going to help me pick up.
这是肺要完成的工作之一
And I'm going to write O2 for oxygen. And it's also blue.
氧气用O2表示，蓝色标注的血管
And that reminds us that it's full of carbon dioxide.
还告诉我们，血液中二氧化碳含量高
It's full of waste because it's coming from the body.
积累了身体各处产生的废物
And the body's made a lot of carbon dioxide that it's trying to get rid of.
身体产生了很多二氧化碳，这时要排掉这些废物
So in the lungs, you get rid of your carbon dioxide and you pick up oxygen.
在肺里，排出二氧化碳，吸收氧气
So that's why I switch, at this point,from a blue-colored vessel to a red-colored vessel.
大家看，这里血管从蓝色变成了红色
So now blood comes back in this way and this way and dumps into this chamber.
血液从这里回去进入这个房室
So what is that?
它叫什么呢？
This is our left atrium.
这是左心房
So just like our right atrium, we have one on the left.
跟右心房对应，左边是左心房
And it goes down into--and you can probably guess what this one is called--
然后血液流入--大家应该能想到这个叫什么
it's our left ventricle.
这是左心室
