Why does the left ventricle have more muscle?

The left ventricle has more muscle than the right ventricle because it pumps oxygenated blood to the entire body, while the right ventricle only pumps deoxygenated blood to the lungs. The left ventricle has to work harder to pump blood against the higher pressure in the systemic circulation, so it needs more muscle to do the job.

The walls of the left ventricle are about twice as thick as the walls of the right ventricle. This is because the left ventricle has to generate a much higher pressure to pump blood out to the body. The pressure in the left ventricle can reach up to 120 mmHg, while the pressure in the right ventricle only reaches about 25 mmHg.

The left ventricle also has a larger cavity than the right ventricle. This is because it has to hold more blood. The left ventricle holds about 120 mL of blood, while the right ventricle only holds about 70 mL of blood.

The left ventricle is the most important chamber of the heart. It is responsible for pumping oxygenated blood to the body, which is essential for life. The left ventricle has to work harder than the right ventricle, so it has more muscle to do the job.