The walls of ventricles are much thicker than atria. Explain. 

Assertion (A): The muscular walls of ventricles are thicker than auricles. Reason (R): This helps in preventing the back flow of blood.

Give reasons for the following : (i) The muscular walls of ventricles are thicker than the walls of atria. (ii) Arteries have thick elastic walls.

The walls of the right ventricle are thicker than the right auricles .

Why is the walls of ventricles thicker than the walss of atria ?

The wall of left ventricle is thicker than right ventricle.

Give biological reason for the following: The wall of the ventricle is thicker than the auricles,