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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About Human Heart
The human heart is a four chambered muscular pump that maintains double circulation through the pulmonary and systemic circuits. Questions cover atria, ventricles, valves, major blood vessels, the cardiac cycle, pressure changes, the conduction system and ECG, while distinguishing arteries and veins from the chambers that receive or eject blood.
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