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From there, the blood leaves the heart through the aorta to be distributed throughout the body. Blood enters the heart through the superior and inferior venae cavae into the right atrium. This blood then flows through the right atrioventricular valve 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.