The<unk>  is on the right side of the heart, between the right atrium and the right ventricle. The normal<unk>  usually has three leaflets and three papillary muscles.<unk> s may also occur with two or four leaflets, and the number may change during life (Van Pragh, 1998).
Tricuspid valve
Pulmonary valve
Mitral valve
Atrioventricular canal
Atrioventricular node
Interventricular septum
Interatrial septum
Sinoatrial node