Why is the myocardium of the left ventricle thicker than that of the right ventricle? A. The left ventricle has to pump a greater volume of blood than the right ventricle. B. The resistance of the systemic circulation is greater than that of the pulmo- nary circulation. C. The left ventricle has to pump blood to the brain against gravity. D. The right ventricle is assisted by the “respiratory pump”.
Option B. The duration of the blood vessels that make up the systemic circuit is more than the duration of vessels withinside the pulmonary circulation. This more period gives a more resistance to the go with the flow of blood. So the LV must be stronger – made from thicker muscle – to exert enough pressure at the blood to triumph over the resistance.
