Question

why are the walls of ventricles arethicker than the walls of auricles

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

Walls of arteries are thick and elastic to withstand the pressure exerted by the heart during contraction and relaxation, due to which blood flows under pressure through arteries.

Veins originate from body parts and carries blood to heart. In the veins, blood flow smoothly due to absence of pressure from heart. Hence veins are thin-walled.