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 Licks? Kim and Sisqó, who are credited under their legal names (Kimberly Jones and Mark Andrews). Sisqó wrote the song's hook and contributed verses. The vocals were recorded by Dave Wade and Stephen Dent at Daddy's House Recording Studios in New York City and Trans Continental Studios in Orlando, with Ed Raso mixing the audio. "How Many Licks?" was released as the second single from Lil' Kim's second album, "The Notorious K.I.M." (2000), as a 12-inch single and CD single by Atlantic Records and Queen Bee Entertainment. A remix by American production duo the Neptunes was also made available, with vocals