Question

How do you account for the following differences?
(a) The left ventricle has thicker walls than the right ventricle.
(b) The walls of the right ventricle are thicker than those of the right auricle.

Answer 1

(a) The left ventricle pumps blood to the farthest points in the body such as the feet, the toes and the brain against the gravity while the right ventricle pumps the blood only up to the lungs. Therefore, the left ventricle has thicker walls than the right ventricle.

(b) The right ventricle pumps blood to the lungs for oxygenation whereas the right auricle receives the blood from the vena cava and passes it to the right ventricle. Therefore, walls of the right ventricle are thicker than those of the right auricle.