The valves involving the atria and ventricles are known as the atrioventricular valves. In between the ideal atrium and the ideal ventricle may be the tricuspid valve. The tricuspid valve has three cusps,[22] which hook up with chordae tendinae and 3 papillary muscles named the anterior, posterior, and septal muscles, https://carolinew345mkj5.wikiinside.com/user