AP BIOLOGY

Detailed explanation-1: -Left ventricle which has to pump blood into the largest network of blood vessels and has to pumps blood against greater resistance than any other chambers of the heart. Hence, the left ventricle has the thickest muscular wall.

Detailed explanation-2: -The left ventricle is the main powerhouse of the heart, having to pump blood all the way around the systemic circulation. Because of this it has the largest, most muscular walls of any of the chambers. In fact, it is three times as thick as the right ventricle.

Detailed explanation-3: -The bottom two chambers are called ventricles. They pump blood to other parts of your body. Because of this, the walls of the ventricles are thicker, containing more cardiac muscle.

Detailed explanation-4: -Explanation: The left ventricle is more muscular than the right ventricle because it must keep the blood in the aorta at high pressure. The high blood pressure in the aorta helps to continue pushing the rest of the blood in the general circulation through the body and back to the heart.

Detailed explanation-5: -Ventricles have thicker walls than the auricles as it has to pump the blood to all parts. Since it has to pump oxygenated blood to all the parts of the body, left ventricle present in the heart has the thickest wall.