How Heart Valves Prevent Backflow

The heart valves keep blood moving in one direction through the heart. The main valve groups are the atrioventricular, or AV, valves and the semilunar valves. Together, they help stop blood from flowing backward as the heart chambers contract and relax.

The AV valves stop blood from moving back i...

The heart valves open and close in response to the pressure gradients created by the contracting heart chambers.

These valves regulate the blood flow by keeping the blood circulation in one direction between the atria, ventricles, and blood vessels.

The atrioventricular or AV valves connect the atria and ventricles.

The tric...