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? song as an example of how Sisqó pushed the envelope of sexuality in popular culture. Brittany Vincent of "Billboard" noted it as an example of how the rapper was unafraid of exploring sex in her music. An editor for Apple Music included the song on its "Lil' Kim Essentials" playlist, writing that Lil Kim' "more than held her own as an agile and self-possessed MC who pushed hip-hop toward its unalloyed id". However, African-American studies professor Mark Anthony Neal criticized the single for perpetuating the sexual objectification of women. Comparing "How Many Licks?" with American singer Tweet's 2002 song "Oops