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whats a booger? 不管你是长大了的好奇宝宝。还是长不大的十万个为什么，人体大探索都将成为你认识自己的好选择!鼻屎是什么?头发是怎么长出来的?人为什么会流血?这些问题，你是不是都困惑过?现在，你找到答案了吗?答案就在这里! Hey, get your finger outta there! Instead of picking them out, lets learn about those little blobs. Yeah, were talking about boogers. 嘿，把你的手指拿出来!别再抠了，我们一起来研究一下这些小东西。没错，我们要说的正是鼻屎! To understand what boogers are, you need to know about mucus. Mucus is the sticky, slimy stuff thats made inside your nose. You may have another name for nose mucus: snot. Your nose and sinuses make about 1 liter of snot every day. 要了解鼻屎，我们就要先来认识黏液。黏液是我们鼻子里黏稠又粘滑的液体，你也可以叫它鼻涕。你的鼻子和鼻窦每天要分泌出大概一升的鼻涕。 Mucus has a pretty important jobit protects the lungs. When you breathe in air through your nose, it contains lots of tiny things, like dust, dirt, germs, and pollen. If these made it all the way to the lungs, the lungs could get infected, making it tough to breathe. Luckily, snot helps trap this stuff, keeping it in the nose and out of the lungs. | 
