There are 4 valves in the heart. These are the mitral valve, located between the left atrium and left ventricle on the side of the heart, the tricuspid valve, located between the right atrium and right ventricle on the right side of the heart, the pulmonary valve, through which dirty blood passes after the right ventricle to be cleaned with oxygen, and the aorta, where clean blood passes from the left ventricle before being distributed to the whole body. It is the cover. Most frequently...