After the Russian Revolution of 1917, Georgia declared independence in 1918, but the democratic Republic of Georgia, ruled by a social-democratic government, was invaded by the Red Army in 1921, a few days after it was recognized by European states.
And.. The Semilunar Valves prevent the back flow of the blood from the arteries to the ventricles. Explain what happens to tissues, such as the heart, or the brain, if oxygenated blood is not delivered in a timely manner. The tissue of the organ starts to die.
As blood flow beyond the clot of blood or foreign matter is reduced or cut off, the part of the body thus deprived of oxygen may become damaged. If the brain becomes damaged, a stroke may result. If the heart muscle becomes damaged, a heart attack may result.