FlexiLingo
Multicellular Function: Why We Aren’t Just One Big Cell: Crash Course Biology #41
- 科学
There are countless types of plants and animals on Earth, but how do they work? In this episode of Crash Course Biology, we’ll take a bird’s eye view of how multicellular life functions, including how it’s organized, how it regulates itself to maintain homeostasis, and the big question: Why are these living things so wildly complex? Introduction: Bizarre Beasts 00:00 Multicellular Organization 1:16 Cell Specialization 3:34 Why We Aren't Unicellular 4:37 Cons of Multicellularity 5:53 Dr. Rebeca Gerschman 6:44 Homeostasis 8:24 Review & Credits 11:09 This series was produced in collaboration with HHMI BioInt...
打开播放器：完整文字稿，每个单词都可点击，附翻译和单词卡。
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B1 · 中级
能听懂简单新闻就可以
- 88% 的单词在 B1 或更简单的水平。
- 每分钟 118 词：语速慢，清晰。
- 整集共有 76 个较难的单词（B2 及以上）。
试一试：点任意单词
来自本集开头的真实句子，每个单词都标出了难度级别。
that will lead to an organism's continued survival.
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And while we have our differences, all multicellular organisms use the same basic operating system.
点一个单词，用你的语言查看释义。
这些单词你认识吗？
本集中 8 个较难的单词。点一个查看释义，然后标记一下。
标记几个单词，我们会告诉你这一集是否适合你的水平。
这一集适合你吗？
B1 · 中级
能听懂简单新闻就可以
- 88% 的单词在 B1 或更简单的水平。
- 每分钟 118 词：语速慢，清晰。
- 整集共有 76 个较难的单词（B2 及以上）。
文字稿
本集开头部分。完整文字稿在播放器中。
较难的单词（B2+）
Life is… weird. An octopus has a mini-brain in each of its eight arms, operating them semi-independently from its central brain. Many plant species purposefully defend themselves from being eaten by releasing toxins despite not having brains at all. And wombats take cubed-shaped poos!
When it comes to multicellular organisms, or living things made of more than one cell, our planet has a bevy of bizarre beasts. But what we call weird, be it the nervous system of an octopus or the digestive tract of a wombat, is actually the result of millions of years of evolution selecting for traits that will lead to an organism's continued survival.
Each of these internal systems fits the needs of the organism that evolved them. And while we have our differences, all multicellular organisms use the same basic operating system. We're organized and regulated groups of cells, collaborating to form systems that operate in intricate harmony.
以上是开头部分。 本集其余部分（17 分钟）在播放器中：每个单词都可点击，附翻译、生词收藏和单词卡。
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