How many hearts does an Octopus have?
Correct answer: C. 3
- A. 1
- B. 2
- C. 3
- D. 4
Explanation
An octopus has three hearts: two branchial hearts pump blood to the gills, while one systemic heart pumps oxygenated blood to the rest of the body. Students may choose one because humans have one heart, but the octopus has a specialised three-heart circulatory system.
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