Ключевые слова: anatomy, arterial, backdrop, background, bacteria, biology, blood, blood flow, bloodstream, capillary, cardiovascular, cells, cellular, circulation, circulatory, cluster, copy space, detailed, digital, education, erythrocytes, flow, graphic, health, healthcare, hematology, hemoglobin, immunology, life, medical, medicine, microscopic, network, organism, oxygen, pathology, physiology, plasma, red, red blood cells, research, science, spherical, system, teaching, transport, vein, vessel, viruses,