One of the countryâs largest annual fireworks displays. Watch the Target Fireworks light up the Minneapolis sky! Come early for Aquatennial Pre-Fireworks Festivities beginning at 6 pm and enjoy food trucks, your favorite festival treats, live music and much more. A full schedule of the pre-fireworks festivities and music lineup will be announced soon.
Heart valve disease occurs if one or more of your heart valves don't work well. The heart has four valves: the tricuspid, pulmonary, mitral, and aortic valves. These valves have tissue flaps that open and close with each heartbeat. The flaps make sure blood flows in the right direction through your heart's four chambers and to the rest of your body.
There are also two semilunar valves; one between the right ventricle and the lungs (pulmonary semilunar valve) and one between the left ventricle and the aorta (aortic semilunar valve). The main purpose of the valves is to prevent backflow of blood in the heart. There are things called the chordae tendinae and papillary muscle that help control the opening and closing of the valves as blood flows through them. There are also valves in the veins.