That's a total of 2,477,300,000 seconds.

這總共是2,477,300,000秒。

But let's break that down.

但讓我們把這個問題分解一下。

By the time I finish reading this sentence, 20 million new cells have just been replaced in your body, 20 million in just a few seconds.

當我讀完這句話的時候，你的身體裡剛剛更換了2000萬個新細胞，在短短的幾秒鐘內就更換了2000萬個。

Compound that over a lifetime.

在一生中，這種情況會不斷增加。

And well, your body achieves some pretty incredible feats.

而且，你的身體實現了一些相當不可思議的壯舉。

Let's start with our largest organ skin.

讓我們從我們最大的器官皮膚開始。

It reproduces about 30,000 to 40,000 cells every minute.

它每分鐘繁殖約30,000至40,000個細胞。

That means we shed a whole layer of outer skin every 2-4 weeks or 1000 bodies worth in a lifetime.

這意味著我們每2-4周就會脫落一整層外皮，或者一生中會有1000個身體的價值。

And underneath your skin lies a vast network of blood vessels spread out.

而在你的皮膚下，有一個龐大的血管網絡分佈著。

This network of veins, arteries and capillaries would extend over 100,000 miles.

這個由靜脈、動脈和毛細血管組成的網絡將延伸超過10萬英里。

That's long enough to wrap around the earth's equator four times and through those blood vessels, the heart pumps about 7500 liters of blood every day.

這長度足以繞地球赤道四圈，通過這些血管，心臟每天要泵出約7500升的血液。

That's an estimated 215 million liters throughout your lifetime.

這意味著你的心臟一生中汞出約2.15億升血液。

Or enough blood to fill a whopping 86 Olympic swimming pools.

或者說是足夠填滿一個高達86個奧林匹克游泳池的血液。

The red color in your blood comes from hemoglobin proteins and iron.

血液中的紅色來自於血紅蛋白蛋白質和鐵。

And you get that iron mainly from your diet, which is then absorbed into your bloodstream from your gut.

而你主要從你的飲食中獲得這些鐵，然後從你的腸道吸收到你的血液中。

The average adult will have 3 to 4 g of iron at any given time, but will lose and replace 1.5 mg every day.

普通成年人在任何時候都會有3到4克的鐵，但每天會損失和補充1.5毫克。

So over a lifetime you'll absorb at least 43 g worth.

是以，在一生中，你將吸收至少43克的價值。

That's equivalent to 10 standard iron nails.

這相當於10個標準鐵釘。

And speaking of 10 nails, your fingernails grow at a rate of 3.5 millimeters per month.

而說到10個指甲，你的指甲以每月3.5毫米的速度生長。

That means if you want your entire life without ever cutting them, they could get more than three m long.

這意味著如果你想讓你的一生都不剪掉它們，它們可能會變得超過三米長。

Shred hard shalal, for example, stopped cutting his nails when he turned 14 and when he was 82 he finally cut his thumb nail.

例如，Shred hard shalal在14歲時就不再剪指甲，當他82歲時，他終於剪了拇指的指甲。

It was almost two m long.

它幾乎有兩米長。

But your fingernails grow at a snail's pace compared to your hair.

但與你的頭髮相比，你的指甲是以蝸牛的速度生長的。

On average, each hair grows 12.5 millimeters per month.

平均而言，每根頭髮每月生長12.5毫米。

So over a lifetime, that's about 12 m of hair, almost the length of an American school bus.

是以在一生中，大約有12米長的頭髮，幾乎相當於一輛美國校車的長度。

And if you look at what else your head produces on the regular saliva is a big one.

如果你看看你的腦袋還經常產生什麼，唾液就是一個大問題。

You produce on average one leader every day.

你平均每天產生一個領導人。

That's about 28,600 liters over a lifetime or enough to fill 39 4 person hot tubs.

這在一生中大約是28,600升，或足以填滿39個4人的熱水浴缸。

Yeah, but believe it or not, you actually produce more mucus and snot each day than saliva, about 1.4 liters.

是的，但信不信由你，實際上你每天產生的粘液和鼻涕比唾液更多，大約1.4升。

That's about 54 hot tubs worth in your lifetime.

你這一生中的量約為54個熱水池。

And even more disgusting is the fact that you swallow most of that and all that liquid goes somewhere.

而更噁心的是，你吞下了大部分的東西，所有的液體都去了某個地方。

So let's talk about the other end our urine.

再來，讓我們來談談他的終端-尿液。

The average healthy adult produces anywhere from 400 to 2000 mL a day or on average, 34,400 liters in a lifetime.

一般健康的成年人每天產生400至2000毫升，或平均一生產生34400升。

Now, if you have your hot tub conversion chart handy, you will see that that fills up 46 4 person hot tubs.

現在，如果你有你的熱水池轉換表，你會看到，這可以填滿46個4人熱水池。

That might seem uh, impressive.

這可能看起來反胃、令人印象深刻。

But it has nothing on one of your biggest, most important internal organs, your liver, Your liver can regenerate itself, sort of like how a starfish can regenerate lost limbs.

但它對你最大的、最重要的內部器官之一--你的肝臟毫無影響。你的肝臟可以自我再生，有點像海星可以再生失去的四肢。

That's thanks to the enormous amount of regenerating cells in your liver.

這要歸功於你肝臟中大量的再生細胞。

In fact, a healthy human could lose 65% of their liver and ultimately would be no worse for wear since it would simply grow back in just a few months.

事實上，一個健康的人可能會失去65%的肝臟，但最終不會更糟，因為它在短短几個月內就會重新生長。

So when you think about it, your body is like a mini factory generating loads of cells and fluids daily.

因此，你會發現你的身體就像一個小型工廠，每天產生大量的細胞和液體。

But not all of your body parts are able to reproduce your inner ear hairs in charge of hearing.

但並不是你所有的身體部位都能再現你負責聽覺的內耳毛。

Never regrow.

永遠不會重新生長。

So if they get damaged, your hearing will suffer or worse disappear.

是以，如果它們被損壞，你的聽力將受到影響，甚至消失。

And even the most important organ in your body, your brain doesn't produce that many new cells you're born with roughly 90 billion nerve cells in your brain called neurons And you lose on average 60 of those neurons every minute.

即使是你身體中最重要的器官，你的大腦也不會產生那麼多新細胞，你出生時大腦中大約有900億個神經細胞，稱為神經元，而你平均每分鐘失去60個神經元。

But during a traumatic brain injury, like a stroke, your brain can lose millions per minute.

但是在創傷性腦損傷期間，如中風，你的大腦每分鐘可以損失數百萬。

That said, the human brain can still recover from this loss.

也就是說，人腦仍然可以從這種損失中恢復。

Thanks to something called plasticity plasticity describes how our brains remaining neurons take on on different roles and form new connections to make up for any important connections that were lost.

由於一種叫做可塑性的東西，可塑性描述了我們的大腦剩餘的神經元如何承擔不同的角色並形成新的連接，以彌補任何失去的重要連接。

So whether it's adaptation or regeneration, our bodies go on quite a remarkable journey.

是以，無論是適應還是再生，我們的身體都經歷了一個相當了不起的旅程。

So next time you get a paper cut, try to look on the bright side of things and give thanks to those hardworking cells, fixing you right back up.

所以，下次你被紙割傷時，試著從樂觀的角度看，感謝那些辛勤工作把你修復好的細胞，。