Questions

The correct answer is C. Left ventricle.

Explanation: The left ventricle has the thickest wall of any heart chamber because it is responsible for pumping oxygenated blood to the entire body through the aorta. This requires a high level of force, so the left ventricle must generate significant pressure, necessitating a thick muscular wall. In contrast, the right ventricle only needs to pump blood to the lungs, which requires less force, so its wall is thinner.