MICROANATOMY

Detailed explanation-1: -As the heart muscle contracts and relaxes, the valves open and shut. This lets blood flow into the ventricles and atria at alternate times.

Detailed explanation-2: -As the heart muscle contracts and relaxes, the valves open and close, letting blood flow into the ventricles and out to the body at alternate times.

Detailed explanation-3: -If the valve doesn’t open fully, it will block or restrict the flow of blood. This is called valve stenosis or valve narrowing. If the valve doesn’t close fully, the blood will leak back into the heart instead of forwards into the body. This is called valve incompetence, valve regurgitation or a leaky valve.

Detailed explanation-4: -Heart valves open and shut with each heartbeat to keep blood flowing in the right direction. Problems with heart valves can occur if the valves are leaky (a condition called regurgitation), too narrow (stenosis), or don’t have a proper opening (atresia).