Question

Why are the walls of the ventricles more muscular than the walls of the atria

Answer 1

Ventricles have thicker walls than auricles because:

The ventricles have to transport the blood from the heart to the different body parts. iii. Hence there is a need for thick muscular walls of the ventricles. ... The pressure of blood in the auricles is not much so the walls of auricles are thinner than ventricles.

Answer 2

The walls of the ventricles are more muscular than the walls of the atria because they have to pump blood to the remotest parts of our body like feet , toes etc ..while the atria have to pump blood to the nearest parts of the body.That's why the walls of the ventricles are more muscular.

hope this answer will be helpful ^_^