The ventricles of the mammalian heart have thicker muscular walls than the auricles because the

The ventricles of the mammalian heart have thicker
muscular walls than the auricles because the

Answer Details

The ventricles of the mammalian heart have thicker muscular walls than the auricles because the ventricles have to pump blood to longer distances than the auricles. The ventricles receive blood from the atria and then pump it out to the entire body, so they need to generate more force to overcome the resistance of the blood vessels. Therefore, their muscular walls are thicker and more powerful to provide the necessary force to pump blood to the different parts of the body.