The Animal with Three Hearts

Story 2 of 10

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Highlighted words are key vocabulary — tap one to see its translation. Colors show the part of speech:

Verb Adjective Adverb Expression

The octopus is far more remarkable than most people think. Surprisingly, it does not have one heart but three. Two of the hearts pump blood to the gills, while the third pumps blood to the rest of the body. On top of that, an octopus's blood is not red but blue.

The blue colour comes from what the blood contains. Human blood is red because of iron, but an octopus's blood contains copper, which makes it look blue. Here is the strangest part: when an octopus swims, the heart that pumps blood to its body stops. As a result, the octopus tires quickly, so it prefers crawling along the sea floor to swimming.

Vocabulary from this story

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remarkable
ajoyib, diqqatga sazovor
Surprisingly
ajablanarlisi shundaki
pump
haydaydi
gills
jabralar
On top of that
bundan tashqari
contains
tarkibida boʻladi
copper
mis
stops
toʻxtaydi
tires
charchaydi
prefers
afzal koʻradi
crawling
oʻrmalash

Grammar from this story

Key patterns that appeared in the text.

prefer A to B

B ga qaraganda A ni afzal koʻrmoq. (Otlar yoki -ing shakli bilan.)

  • The octopus prefers crawling to swimming.
  • I prefer tea to coffee.

as a result

Natijada, shuning oqibatida (oqibatni bogʻlaydi).

  • The heart stops; as a result, the octopus tires quickly.
  • He didn't study. As a result, he failed.

Check your understanding

Read the story, then choose the best answer. Tap a choice to check it.

1. Why is an octopus's blood blue?

2. What happens when an octopus swims?

3. Why does the octopus prefer crawling to swimming?