4 heart valves
Atriovenous Valves
1 Tricuspid - present on the right side of the heart
1 Mitral/ Bicuspid - valve on the left side
Semilunar Valves
1 Pulmonic Valve - lies between right ventricle and pulmonary artery
1 Aortic Valve - lies between left ventricle and aorta
Fibrous connective tissue prevents enlargement of valve openings and anchors valve flaps.
Valve closure prevents backflow of blood during and after contraction
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