Heart valve tricuspid valve has anterior, posterior, and septal cusps; and the mitral valve has just anterior and posterior cusps. The valves of the human heart can be grouped in two sets: 1- Two Atrioventricular (AV) valves to prevent backflow of blood from the ventricles into the atria a) Tricuspid valve, located between the right atrium and right ventricle. b) Bicuspid or mitral valve, located between the left atrium and left ventricle. 2- Two Semilunar valves to prevent the backflow of blood into the ventricle a) Pulmonary semilunar valve, located at the opening between the right ventricle and the pulmonary trunk. b)
The Heart String & How to Pull It 21 March and finishing on 8 April. Pledgers were offered various basic packages that included a physical copy of the album, a digital download of the album, a download of what became the "Chemicals EP", an album-themed T-shirt and an album-themed poster. All of the basic packages included the option to download the album a few days in advance of the physical release. Additionally, there were several special packages that were offered at premium prices. All of the special packages included a digital download of the album. The Heart String & How to Pull It The Heart String & How