Left ventricle has more thick walls than the right ventricle.

Hint: Our heart consists of four Chambers, two small upper chambers called atria and two large lower chambers called ventricles. The walls of ventricles are much thicker than that of atria. Both the atrium and the ventricle are separated by a wall called the atrioventricular septum.

Complete answer:
- Heart ventricles are the large lower Chambers of the fibromuscular organ that works to keep blood moving through the body.
- The atria pump the blood down into the ventricle. The ventricles then pump the blood out of the heart through arteries. The ventricles have an enormous role in maintaining adequate cardiac output to give blood flowing.
- The walls of the chamber and particularly the walls of the left ventricle are more heavily muscled than the walls of the artery or upper Chambers(right ventricle) because the right ventricle needs to fill blood to the lungs for oxygenation while the left ventricle pumps oxygenated blood around the entire body. That’s why the left ventricle needs higher forces to pump blood through the systemic circulatory pathway (around the body) compared to the pulmonary circulatory pathway.
- Additionally, the blood being pumped to the lungs from the right ventricle needs to be at lower pressure in order to prevent damage to the many thin capillaries the blood goes through in the lungs. This explains why the wall of the left ventricle is thicker.
Let's learn some key facts of the heart verticals.

Additional information:
Right Ventricle: Right ventricle is smaller, Have a lower pressure gradient, limited by the tricuspid and pulmonary valves.
- Have three prominent papillary muscles - anterior, posterior, and septal.
- pumps blood into the pulmonary circuit.
Left Ventricle: Left ventricle is larger, has a higher pressure gradient, limited by the mitral and aortic valves.
- Pumps blood into the systemic circulation.
Interventricular Septum: Separates the left and right ventricle and helps the left ventricle for the pumping function.

Note: At Least 70 milliliters of blood are pumped out by each ventricle during a cardiac cycle. The volume of blood pumped out by each ventricle of the heart per minute is called the cardiac output and it is equal to the product of stroke volume and heart rate(approx 5 liters).