Question

The upper and lower chambers of the heart are separated by
Ventricles
Valves

Answer 1

The upper and lower chambers of the heart are separated by **valves**. Specifically, the atrioventricular (AV) valves include the tricuspid valve (between the right atrium and right ventricle) and the mitral valve (between the left atrium and left ventricle). These valves prevent backflow of blood and ensure proper blood flow through the heart. The ventricles are the lower chambers themselves, responsible for pumping blood out of the heart.