structure of the heart valves anatomy. mitral valve, pulmonary valve, aortic valve and the tricuspid valve.

atrium biology muscle left pump flow body anatomy aorta aortic artery attack blood cardiac cardiology cardiovascular circulation coronary cross diagram disease education health healthy heart human illustration medical medicine mitral organ pulmonary science section stenosis structure system systole systolic tricuspid valve valves valvular vein ventricle anterior posterior right side