Question

The walls of the atrium are thicker than the ventricles

Answer 1

Answer:

this is because the blood is pumped out of heart at greater pressure

Answer 2

Answer:

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

HOPE IT HELPS ✌✌✌