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 Are Things in Glocca Morra? How Are Things in Glocca Morra? "How Are Things in Glocca Morra?" is a popular song about a fictional village in Ireland, with themes of nostalgia and homesickness. It was introduced by Ella Logan in the original Broadway production of "Finian's Rainbow". The music was composed by Burton Lane and the lyrics were written by E.Y. Harburg. The song was published in 1946 and introduced in the 1947 musical "Finian's Rainbow". There is no actual Glocca Morra in Ireland (though there is a Glockamara). In a television interview late in his life, Harburg revealed that the name "Glocca Morra" was