Ключевые слова: aids, anatomy, animal blood, antibody, artery, backgrounds, bacterium, biology, blood, blood cell, blood vessel, bloodstream, cancer, cancer cell, cell, cholesterol, closeup, fat, flowing, flu virus, healthcare and medicine, healthy lifestyle, hemoglobin, highscale magnification, human artery, human cell, human vein, illness, illustration, immunology, magnification, medical research, medicine, microbiology, microorganism, microscope, organic, oxygen, research, science, shape, small, vein, virus, white blood cell,