Your mitral valve is utterly important
The left Atrium is the collection chamber for all oxygenated blood, coming back from the lungs. Trough the widely open mitral valve it then flows to the left ventricle. It is the most powerful muscle that pumps the blood trough the open aortic valve towards the aorta from where it will irrigate the entire body. It is utterly important for the mitral valve to close nicely to prevent the blood from going backwards to the lungs as that is obviously very unfavorable. The mitral valve is like a ‘mitre’ with a big anterior leaflet and a smaller posterior leaflet. They act as a ‘parachute’ as they coapt in the middle of the orifice to allow for a perfect closure of the ‘backdoor’.