Heart valve chambers are lined with endocardium. Heart valves separate the atria from the ventricles, or the ventricles from a blood vessel. Heart valves are situated around the fibrous rings of the cardiac skeleton. The valves incorporate leaflets or cusps, which are pushed open to allow blood flow and which then close together to seal and prevent backflow. The mitral valve has two cusps, whereas the others have three. There are nodules at the tips of the cusps that make the seal tighter. The pulmonary valve has left, right, and anterior cusps. The aortic valve has left, right, and posterior cusps. The
How Many Birds gets faster. The singer states that he's lonely without his girl and doesn't know what to do. The Kids covered the song the same year, lead vocalist Michael Griffith and Tony Borg singing to the Bee Gees backing tracks. The Kids never recorded again but the fact that they chose this song to record proves that the Saint Clair tapes were not discarded when the studio closed, and were presumably in Nat Kipner's hands. But Kipner today has no idea where they went to. How Many Birds "How Many Birds" is a song written by Barry Gibb, recorded by the