part of the human heart. anatomy. diastole and systole.filling and pumping of human heart structure anatomy watercolor

anatomical anatomie anatomy and aorta artery atrium background blood body cardiac cardiology cardiovascular care cava chamber circulation circulatory coronary cross design diagram diastole drawing health heart human illustration internal left medical medicine muscle orchestra organ part pulmonary pump pumping red right science scientific section structure system systole systolefilling tissue tube vacuum valve vein ventricle watercolor white