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唾液有什么用? – 译学馆
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唾液有什么用?

How Does Saliva Work?

(classical music)
[经典音乐]
(chalk scribbling)
[粉笔涂鸦声]
– Hey, I’m Julie and welcome to BrainStuff.
嘿 我是朱莉 欢迎来到BrainStuff
Most of us think that the spit inside of our mouth is gross.
我们大多数人认为嘴里的唾液是恶心的
I mean, it’s not as nasty as the acidic bile
我的意思是 它不像《异形》里怪物的大口
that a xenomorph’s gaping maw has,
喷射的酸性胆汁一样令人讨厌
but it’s still pretty nasty.
但它仍然非常讨厌
Saliva is actually an incredibly complex fluid
唾液实际上是一种难以置信的复杂液体
that facilitates lots of necessary functions.
对大量必要的功能有利
It lubricates our mouths, moistens our food,
它润滑我们的嘴 并湿润食物
assists in digestion, protects our teeth,
协助消化 并保护我们的牙齿
and even defends our mouths from microorganisms.
甚至可以防止微生物侵入我们的口腔
Saliva is made by a group of cells called salivary glands
唾液由一群称为唾液腺的细胞产生
that deliver it into our mouths through ducts. Now,
把唾液通过管道运送到嘴里
humans have four kinds of salivary glands. First,
现在 人类有四种唾液腺
there’s the parotid glands which are opposite
首先是腮腺 它们对称分布在
our front, lower molars, kinda nearly parallel
下面臼齿的前方
to our ear lobes.
几乎平行于耳垂
These secrete a thin liquid that’s full of rich
这些分泌细胞
antibacterial proteins and compounds that remineralize our teeth.
充满了抗菌蛋白质和使牙齿再矿化的化合物
They don’t care whether or not you’re chewing
不论你是否在咀嚼
on bread or plastic, they will go to work
面包或塑料甚至其他东西
on anything in your mouth. Next,
它们都会起作用
there’s the submandibular glands which
下颌下的腺体
are shaped kinda like eggs and they’re embedded
形状有点像鸡蛋
below the floor of the mouth just above the throat. Now,
它们嵌入喉部正上方下的嘴底
these produce a more viscous fluid
它们会产生更粘稠的
used to lubricate the throat and mouth. Also,
用于润滑喉咙和嘴巴的液体
below the floor of the mouth,
在嘴巴的下面
there’s the sublingual glands which are shaped like almonds.
也有像杏仁一样的舌下腺
They produce similar lubricating secretions.
他们产生类似润滑的分泌物
And finally, there’s a fourth salivary gland
最后是第四个 唾液腺
that covers the tongue and the lining of our mouths
它用数百个较小的腺体
with hundreds of smaller glands.
覆盖舌头和嘴巴的内层
You know how sometimes you feel small bumps on your inner lip? Well,
你有时会觉得你的内唇有些不平吗?
that’s them, and while they lubricate the mouth,
它们就是唾液腺 他们能润滑口腔
they also protect it against infections. Okay,
也保护口腔免受感染
so that’s a lot of saliva being secreted
所以很多唾液
by those four different glands.
都由那四个不同的腺体分泌
It’s mostly made of water, but it also contains enzymes
唾液主要由水组成 但也含有酶
that break down food for digestion and do the whole
酶可以分解消化食物
“protection from infection” thing. So,
并能“防止感染”
when it’s not digesting and making things taste great,
当它没有消化食物或使食物美味时
saliva is also a lethal killer!
唾液也是一个致命的杀手!
Of germs!
对细菌来说!
In fact, spit is so good at cleaning, some art conservators
事实上 吐口水可以清洁
use it on fragile surfaces instead of chemical solutions.
艺术管理员在易碎的表面上使用它而非化学用品
In some cultures, a mother will even spit
在一些文化中 母亲甚至
into her infant’s mouth to teach their immune systems
会吐口水到她婴儿的嘴里
how to produce antibodies and destroy pathogens. Because,
让免疫系统知道如何产生抗体并摧毁病原体
of all the antibodies already in
由于母亲口水中
the mother’s saliva, this introduces the
已经存在的抗体
infant to bacteria without getting them sick.
就能够在不让婴儿生病的情况下训练免疫系统
And finally, did you know that our saliva contains our entire genetic blueprint?
最后 你知道你的唾液中含有我们整个的基因蓝图吗?
If you’re trying to get away from a crime scene,
如果你想逃离犯罪现场
do not spit on anything because it only takes
那就不要吐口水 因为它只需要
half of an eye-dropper drop worth of spit
一滴眼药水那么多口水
to sample your DNA.
就能取样你的DNA
You can even take a sample yourself, send it through the mail,
你甚至可以自己取样 并通过信件发送
and get your own genetic information. So,
来获得你自己的遗传信息
what is your favorite thing about spit?
所以关于吐口水 你最喜欢什么?
Let us know in our YouTube comments and,
请在您的YouTube评论中告诉我们
while you’re at it,
还有一件事
please subscribe to BrainStuff channel.
请订阅BrainStuff频道
That way you’ll know whenever we’ve dropped
这样每当我们为你更新
more everyday science for you to devour.
更多的日常科学节目时 你就能收到

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视频概述

唾液没有那么恶心!它们其实很有用。

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收集自网络

翻译译者

工追

审核员

审核员H

视频来源

https://www.youtube.com/watch?v=bYudf5iSJ_M

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