Heart walls of the heart to valves by cartilaginous connections called chordae tendinae. These muscles prevent the valves from falling too far back when they close. During the relaxation phase of the cardiac cycle, the papillary muscles are also relaxed and the tension on the chordae tendineae is slight. As the heart chambers contract, so do the papillary muscles. This creates tension on the chordae tendineae, helping to hold the cusps of the atrioventricular valves in place and preventing them from being blown back into the atria. Two additional semilunar valves sit at the exit of each of the ventricles. The
How My Heart Sings! How My Heart Sings! How My Heart Sings! is a 1964 album by jazz musician Bill Evans, recorded at the same time as "Moon Beams". It was reissued in 1992 with one bonus track. Writing for Allmusic, music critic Thom Jurek wrote of the album "This is a tough recording; it flies in the face of the conventions Evans himself has set, and yet retrains the deep, nearly profound lyricism that was the pianist's trademark." On All About Jazz C. Michael Bailey said "After the ballad-laden "Moon Beams", producer Orrin Keepnews wanted a slightly more up-tempo recording that resulted in