The heart valves ensure unidirectional blood flow through the heart chambers. There are four main valves:
- Atrioventricular Valves: The tricuspid valve (right side) and the mitral valve (left side) are located between the atria and ventricles. They prevent backflow of blood into the atria during ventricular contraction.
- Semilunar Valves: The pulmonary valve (right side) and the aortic valve (left side) are located at the exits of the ventricles. They prevent backflow into the ventricles after blood is ejected into the pulmonary artery and aorta.
