Question

Why do the ventricles have thicker walls than atria?

Answer 1

The ventricles of the heart have thicker muscular walls than the atria. This is because blood is pumped out of the heart at greater pressure from these chambers compared to the atria. ... This is due to the higher forces needed to pump blood through the systemic circuit (around the body) compared to the pulmonary circuit

Answer 2

Because ventricles have to pump blood into various organs, they have thicker muscular walls than atria do.

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