What is the primary function of the heart's ventricles?

The primary function of the heart's ventricles is to pump blood out of the heart. There are two main ventricles in the heart: the right ventricle and the left ventricle. The right ventricle is responsible for pumping deoxygenated blood into the lungs via the pulmonary artery, where it gets oxygenated. In contrast, the left ventricle pumps oxygen-rich blood out to the rest of the body through the aorta.

The ventricles have thick muscular walls that enable them to generate the necessary force to pump blood effectively. This pumping action is crucial for maintaining the circulation of blood throughout the body, ensuring that organs and tissues receive the necessary oxygen and nutrients.

The other options pertain to different functions within the cardiovascular system. While the atria of the heart receive blood from the veins, the filtering of blood is primarily performed by the kidneys, and regulation of blood pressure is a function involving various components of the cardiovascular system, including the heart and blood vessels, but is not specific to the ventricles.