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
I Belong to You/How Many Ways I Belong to You/How Many Ways "I Belong to You"/"How Many Ways", alternatively "How Many Ways"/"I Belong to You" in the vinyl edition, is the fifth and final single from American R&B singer Toni Braxton's self-titled debut album, "Toni Braxton" (1993). The single was released in the United States in 1994 with both songs as double-sided songs. "I Belong to You" was written by Vassal Benford and Ronald Spearman and produced by Benford. While there was no music video for "I Belong to You", the song garnered Braxton a nomination for Best Female R&B Vocal Performance at the 1996 Grammy