Explain why the left side of the heart is more muscular than the right?

The left side of the heart is more muscular than the right because it is responsible for pumping oxygenated blood to the entire body, which requires greater force and pressure. In contrast, the right side pumps deoxygenated blood to the lungs, needing less muscular strength as the lungs are located nearby. This difference in workload necessitates a thicker muscular wall on the left side, particularly in the left ventricle. The increased muscularity ensures efficient circulation throughout the body's tissues and organs.