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[ intro ] Whew! Made it! Squeaks and I raced allll the way down here! He won, but I finally caught up. And now we’re both kind of out of breath, huh? That happens sometimes when you’ve been moving a lot, like if you’re running around. Your body needs more air to keep your muscles

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– [Voiceover] I don’t think it’s any secret to anyone that water is essential to life. Most of the biological, or actually in fact all of the significant biological processes in your body are dependent on water and are probably occurring inside of water. When you think of cells in your body, the cytoplasm inside

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Captioning is on. Turn off by clicking the CC button at bottom right! Follow us on Twitter (@AmoebaSisters) or Facebook! If I asked you to describe the biological levels of organization, could you do it? What would those levels be? Actually, what would be the point about caring about it in the first place? Biological

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– [Voiceover] When we study science it’s natural to just categorize a whole series of things as just being really really unimaginably small. So when people say, hey atomic scale, or molecular scale, or protein, or cell, you often just group that together and say oh, those are really really really really small things. But

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– [Voiceover] Let’s study the molecular structure of triglycerides. And in everyday language we often call these fats. We often call these fats. Which is often kind of a feared word but as we’ll see it’s essential for life. Fats in a liquid form is sometimes referred to as oils. And a more technical term

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