Ключевые слова: abstract, anatomical, anatomy, artery, background, biological, biology, bloodstream, body, cadriovascular, capillary, cardiac, cardiovascular, care, circulation, circulatory, circulatory system, closeup, concept, conceptual, coronary, education, educational, health, health care, healthcare, heart, human, human anatomy, inner, internal, intracellular, line, medical, open circulatory system, organ, organs, physical, presentation, rendered, rendering, science, structure, system, treatment, vascular, vein, veins, veins and arteries, venous,