Blekkspruten og de tre hjertene
The octopus is a clever sea animal with three hearts and blue blood.
Before you read
Before you read
Blekksprut er et mykt dyr som bor i havet. Den har åtte armer og ingen bein. Men det mest overraskende er inni kroppen. Blekksprut har tre hjerter, ikke ett.
To av hjertene sender blod til gjellene. Der tar blodet opp oksygen fra vannet. Det tredje hjertet sender så dette blodet til resten av kroppen, slik at blekkspruten har energi til å bevege seg.
Blodet til en blekksprut er blått, ikke rødt. Det er blått fordi det har kobber inni. Dette spesielle blodet hjelper blekkspruten å leve i kaldt, dypt vann. Når blekkspruten svømmer, stopper hovedhjertet, så den liker heller å gå på havbunnen.
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