Federal employees are compensated according to government-regulated pay scales. More than 70 percent of federal employees are paid according to the most common pay scale, the General Schedule (GS) , but there are a variety of alternative pay schedules as well.
Four heart valves control the flow of blood through the heart. They act as one-way doors, opening to let blood exit or enter a chamber, then closing to keep blood from flowing backward. 1  The tricuspid valve controls blood flow from the right atrium to the right ventricle.
Your heart has four chambers. Blood pumps through these four chambers to the rest of your body. The blood in your heart flows from chamber to chamber through four different heart valves. The valves open and close to ensure that blood flows in the proper direction. Each heart valve is made up of thin but strong flaps of tissue (also called leaflets or cusps) that open and close about 100,000 times each day.