What term describes the two lower chambers of the heart?

The term that describes the two lower chambers of the heart is "ventricles." The heart consists of four main chambers: two upper chambers known as atria and two lower chambers referred to as ventricles. The ventricles are responsible for pumping blood out of the heart; the right ventricle sends deoxygenated blood to the lungs for oxygenation, while the left ventricle pumps oxygenated blood to the rest of the body.

Understanding the function of the ventricles is crucial, as they play a significant role in the overall circulation of blood. They are muscular chambers, significantly thicker than the atria, which reflects the greater force needed to expel blood from the heart. This distinction is fundamental in studying cardiac anatomy and function, helping to understand various cardiac conditions and treatments.