Wed, 26 Jun 2019

Curious Kids: why do we sigh?

The Conversation
21 May 2019, 10:20 GMT+10

The tiny sacks of life

You have two lungs that you use to breathe. Each lung is a stretchy sack, kind of like a balloon, but not empty like a balloon. Inside your lung are millions and millions and millions of tiny sacks called

Back to sighing

Here's the thing about the tiny sacks called alveoli: you have so many of them that, actually, you don't need to use them all at once. When you are sitting quietly, you can get move enough gas by using just

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Author: David Farmer | The ConversationThe Conversation

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