What are the lower chambers of the heart called that receive blood and pump it into the arteries?

The lower chambers of the heart that receive blood and pump it into the arteries are known as ventricles. The heart consists of four chambers: two atria (the upper chambers) and two ventricles (the lower chambers). When the ventricles contract, they force blood out of the heart and into the pulmonary artery and the aorta. The left ventricle pumps oxygenated blood to the body, while the right ventricle sends deoxygenated blood to the lungs for oxygenation. Understanding the role of the ventricles is crucial, as they are responsible for the heart's pumping action, which is essential for maintaining blood circulation throughout the body.