The<unk>  (also known as the bicuspid<unk>  or left atrioventricular<unk> , is a dual flap (bi = 2)<unk>  in the heart that lies between the left atrium (LA) and the left ventricle (LV).  In Latin, the term<unk>  means shaped like a miter, or bishop's cap. The<unk>  and the tricuspid<unk>  are known collectively as the atrioventricular<unk> s because they lie between the atria and the ventricles of the heart and control flow.
A normally functioning<unk>  opens to pressure from the superior surface of the<unk> , allowing blood to flow into the left ventricle during left atria systole (contraction), and closes at the end of atrial contraction to prevent blood from back flowing into the atria during left ventricle systole. In a normal cardiac cycle, the atria contracts first, filling the ventricle. At the end of ventricular diastole, the bicuspid<unk>  shuts, and prevents backflow as the ventricle begins its systolic phase. Backflow may occur if the patient suffers from<unk>  prolapse, causing an audible heart murmur during auscultation.
Mitral valve
Pulmonary valve
Tricuspid valve
Atrioventricular canal
Atrioventricular node
Sinoatrial node
Interventricular septum
Bundle of Kent