What are ventricles responsible for in the heart's function?

The ventricles of the heart play a crucial role in its function, primarily characterized by their ability to contract and pump blood out of the heart. The heart has two ventricles: the right ventricle and the left ventricle.

The right ventricle is responsible for pumping deoxygenated blood to the lungs via the pulmonary arteries, where the blood receives oxygen. The left ventricle, which has thicker muscular walls, pumps oxygenated blood to the rest of the body through the aorta. The contraction of the ventricles generates the necessary pressure to propel the blood into the respective circulatory systems, ensuring that oxygen and nutrients are delivered effectively to tissues and organs.

This function of contraction is vital for maintaining proper circulation and sustaining life, making it the primary responsibility of the ventricles. The other options describe different aspects of heart function and blood flow, but they do not accurately capture the essential action of the ventricles in pumping blood.