Multiple choice general knowledge science & technology

How many hearts do the octopus have?

  1. 1

  2. 2

  3. 3

  4. 4
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Octopuses have three hearts - two branchial hearts that pump blood through the gills, and one systemic heart that pumps blood to the rest of the body. This unique cardiovascular system supports their active predatory lifestyle and helps maintain oxygenation in their complex circulatory system. When an octopus swims, the systemic heart actually stops beating, which is why they prefer crawling over swimming.

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