human internal organs circulatory system heart anatomy

abstract anatomical anatomy angina aorta arteries artery atherosclerosis atrial atrium attack beat biology blood body cad cardiac cardio cardiology cardiovascular care circulatory concept coronary design fibrillation flow health healthy heart heartbeat human illustration infaction infographic internal lungs medical medicine mitral muscle myocardial myopathy organ organs pain pectoris physiology pulmonary ray regurgitation science silhouette skeleton system vein veins ventricle