Name: Why Don't Big Animals Get More Cancer?
Uploaded: 2022-06-25T14:56:45.000Z
Duration: 10 min 32 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

That cell and all of the cells that it spawns,

containing anywhere from millions of cells

to more than a thousand trillion individual living units.

A body like yours contains around 37 trillion cells.

To build a human, factoring in the huge number of cells

scientists estimate it takes 10 to the 16th cell visions.

During your lifetime, that's 10 million billion times,

that the machinery of the cell and its DNA instructions

Which is a lot of chances to make mistakes.

the genetic programs or break down the machinery

giving it the power to divide uncontrollably.

So logically speaking, the larger an animal is

In fact, because humans are living longer and longer,

the odds of developing cancer at some point in your lifetime

that for every 10 centimeters taller a person is,

their risk of developing cancer goes up by 10%.

When you consider all of this the obvious conclusion

is biologically and mathematically speaking,

The average human weighs about 70 kilograms

and has approximately 37 trillion cells in their body.

Well that's 70 times more cells than a human has.

A blue whale, the largest thing to live on earth ever,

Which means it has over 2000 times as many cells as a human.

About 79 million billion cells, which is nuts.

And more cell divisions means more chances of mutations

70 times higher odds of cancer than you or me.

have a thousand times fewer cells than human,

both species get cancer at about the same rate.

And as scientists have looked across the animal kingdom,

the animal kingdom's utmost examples of enormity and old age

from an unfortunate end, thanks to oncological illness?

that large animals have evolved better mechanisms

Now for a cell to go down the pathway to cancer,

it usually requires more than one mutation

in more than one type of cancer causing gene.

There are so called oncogenic or tumor producing genes.

they're basically always on and they're telling the cell

whose job it is to keep cells from doing that.

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Why Don't Big Animals Get More Cancer?

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