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  • A turtle's shell is as much a part of its body as our rib cage is of ours.

    カメの甲羅は体の一部であり

  • In fact, it is their rib cage, and their spine, and their vertebrae, and their sternum.

    私たちの胸郭が私たちのものであるように。

  • Basically, a turtle's skeleton is inside out.

    実際には、胸郭です。

  • And just like you can't take a skeleton out of a person, right, you can't take a turtle out of its shell either.

    とその背骨。

  • But if you could, you'd probably be surprised by what you'd discover.

    とその椎骨を紹介しています。

  • Here's the inside of a turtle.

    とその胸骨。

  • That's Maria Wojakowski, a biologist who's been studying turtle ecology for more than a decade.

    基本的に、亀の骨格は裏表があります。

  • Here's your shoulder girdle.

    骸骨を取ることができないように

  • Here's your hip girdle.

    人からは、亀を取ることはできませんよね。

  • Notice how those hips and shoulders are actually inside the turtle's rib cage?

    殻を破ることもできません。

  • Turtles are one of the only land animals on the planet with this feature.

    でも、できたら

  • They're also some of the only animals that can breathe with their butts.

    驚くような発見があるかもしれません。

  • You see, inside a turtle shell is a very particular respiratory system.

    Maria Wojakowski: これがカメの内部です。

  • You will see the lungs towards the top here.

    マリア・ウォジャコウスキーさんです。

  • Now, most land animals breathe by expanding and contracting their ribs, which creates a natural pump that guides air in and out of their lungs.

    ウミガメの生態を研究している生物学者である

  • But turtles can't do this because their rigid shells don't expand.

    を10年以上続けています。

  • So instead they rely on sheets of muscles within their shell to pump in oxygen through their mouths.

    Wojakowski:ここにあなたの肩甲骨があります。

  • That is, most of the time.

    これがあなたのヒップガードルです。

  • Then there are other times when turtles breathe out the other end, more specifically, through what scientists call the cloaca.

    腰や肩の動きに注目

  • It's the same opening that turtles use to urinate, defecate, and lay eggs.

    は、実際に亀の胸郭の中にあるのですか?

  • And in some cases, it can double as a set of gills, sucking in water and absorbing the oxygen within.

    地球上で唯一の陸生動物であるウミガメ

  • Scientists think that turtles do this when they're spending long periods of time underwater, like when they're hibernating.

    この機能は

  • And if you look really closely at the inside of a shell, you'd discover another feature that helps with hibernating underwater: a scaffold-like structure that can store and release chemicals.

    また、動物の中で唯一、呼吸をすることができる動物でもあります。

  • That structure actually helps turtles breathe without any oxygen at all.

    お尻で。

  • It works like this:

    ほら、亀の甲羅の中は

  • Many turtles hibernate in frozen ponds that are starved of oxygen, and to survive, their metabolism switches over from aerobic to anaerobic.

    は呼吸器系にこだわりがあります。

  • That means they stop using oxygen for energy and start using glucose instead, via a process called anaerobic respiration.

    Wojakowski:ここでは、上部に向かって肺が見えます。

  • And the byproduct of that is lactic acid.

    さて、ほとんどの陸上動物は息をしています。

  • Now, theoretically, this acid could build up in a turtle's body and kill it.

    肋骨を広げたり縮めたりすることで

  • That's where the shell's structure comes in.

    これにより、空気を誘導する自然なポンプができます。

  • It can absorb the lactic acid as well as release a bicarbonate to neutralize that acid.

    肺に入ったり出たりする。

  • It's essentially Tums, but for turtles.

    しかし、亀にはこれができない

  • So as it turns out, having a shell is pretty handy for certain situations.

    堅い殻が膨らまないからだ。

  • In fact, scientists think that turtles originally got their shells for digging, likely more than 200 million years ago.

    その代わりに、シート状の筋肉に頼っています。

  • They dig, like, really, really complex burrowing structures underground.

    殻の中で、口から酸素を送り込む。

  • And of course, shells are incredibly useful for defense against predators, no matter how fierce they may be.

    つまり、ほとんどの場合、です。

  • Turtles are amazing.

    それ以外の時間は

A turtle's shell is as much a part of its body as our rib cage is of ours.

カメの甲羅は体の一部であり

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B2 中上級 日本語 カメ 酸素 ウミガメ 冬眠 呼吸 動物

亀の甲羅の中には何がある? (What’s Inside A Turtle Shell?)

  • 2439 151
    林宜悉 に公開 2021 年 03 月 29 日
動画の中の単語