human heart one line art. continuous line drawing of human, internal, organs, heart, blood, aorta, blood vessels

human internal organs heart blood aorta vessels love pump pulmonary vein myocardium atrium ventricle one line art ontinuous drawing hand drawn vector isolated organ anatomy anatomical single concept sketch continuous icon healthy silhouette outline cardiology artery healthcare doodle pulse linear minimalism science template cute health minimalistic medical bit education contour