タコと三つの心臓
The octopus is a clever sea animal with three hearts and blue blood.
Before you read
Before you read
タコは海に住む柔らかい動物です。腕が八本あります。骨はありません。でも、一番驚くことは体の中にあります。タコには心臓が三つあります。一つではありません。
二つの心臓は血をえらに送ります。そこで血は水から酸素を取ります。三つ目の心臓は、その血を体の他の部分に送ります。それでタコは動く力を持ちます。
タコの血は青いです。赤くありません。血の中に銅があるので、青いのです。この特別な血は、冷たくて深い水でタコが生きるのを助けます。タコが泳ぐとき、大きい心臓は止まります。だから、タコは海の底を歩くほうが好きです。
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