Why does the left ventricle have a thicker wall than the right ventricle? a. a more muscular wall is required to supply the pumping that powers the flow of blood into the systemic circuit b. the left ventricle is responsible for systole while the right ventricle is responsible for diastole c. the position of the heart in the chest cavity allows for the left ventricle to develop a thicker wall than the right ventricle d. a more muscular wall is required to supply the pumping that powers the flow of blood into the pulmonary circuit e. the left ventricle contains the pacemaker?