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Class 10 Science Medium Mcq English Medium

Compared to the atria, the ventricles of the heart have thicker muscular walls mainly because:

Question
Compared to the atria, the ventricles of the heart have thicker muscular walls mainly because:
They store more blood
They must pump blood to various organs, requiring more force
They contain more valves
They are smaller in size
Answer
They must pump blood to various organs, requiring more force
Detailed Explanation
Since ventricles must pump blood to various organs (or the lungs), they need thicker, more muscular walls than the atria, which merely collect blood.
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